SocratessTutorials in Law
Tomacsek Mateas CristianOxford Law Self-Learning with Prof. Blackstone

Vocabulary

Glossary

Every term as it actually came up, with the sentence it came up in. The context is the point — a word is easier to keep when you can see where you met it.

Dictionary

English words — legal and ordinary — explained plainly for a reader whose first language is not English. Latin and foreign phrases have their own section below.

ABCDEFGHIJLMOPRSTUVW

abused (of an obiter)

A word that assumes the answer: to say later courts "abused" Atkin's obiter is to assume it was not available to them, which is the very question.
13 Sep.
13 Sep 2026

AC / WLR

Names of law report series. AC = Appeal Cases, WLR = Weekly Law Reports. In "[1932] AC 562", 1932 is the year, AC the series, 562 the page.
Reading items 1 and 2.
16 Aug 2026

allurement

Something on land attractive to children, so that their coming is to be expected.
Addie; Herrington.
13 Sep 2026

anecdotal

Based on stories or personal accounts rather than evidence. It does not mean "detailed".
"anecdotal questions" — 17 Sep.
17 Sep 2026

appellate

Of an appeal court: one that hears appeals from decisions below.
Everywhere.
13 Sep 2026

averments

The facts a party alleges in its written pleadings.
Donoghue, Scots procedure.
6 Sep 2026

binding / persuasive

Binding = the court has no choice, it must follow. Persuasive = the court may follow if convinced. Ratio binds; obiter persuades.
The distinction the whole week turns on.
16 Aug 2026

category of illusory reference

Stone: a legal category that looks as if it refers to something definite and does not — the ratio; "when it appears right to do so".
Stone.
13 Sep 2026

codify

To put a body of judge-made law into a statute.
Occupiers' Liability Acts 1957 and 1984.
13 Sep 2026

common humanity

Herrington's phrase for the limited duty an occupier owes a trespasser whose presence he knows of or should expect.
Morris and Pearson in Herrington.
13 Sep 2026

conclusive

Settles the matter and closes it. Stronger than binding: a bound court may say it disagrees; a conclusive decision may not even be questioned.
Halsbury's word, four times, in Tramways.
13 Sep 2026

concur

To agree with another judge's speech, adding nothing or almost nothing.
Macnaghten, Morris and James of Hereford in Tramways: one line.
13 Sep 2026

core and penumbra

The settled centre of a rule's meaning and its shadowy edge. Rules bind in the core; judges choose at the edge. Hart's answer to "bound in theory, leeway in reality".
The instrument you needed for "bound" and did not reach for.
13 Sep 2026

declaratory theory

The old idea that judges never make law, only find and declare a law that already exists. Lord Reid called it a fairy tale; Goodhart rejected it too.
Reid, "The Judge as Law Maker" (1972).
13 Sep 2026

delict

Scots law's word for what English law calls tort: a civil wrong outside contract.
Donoghue was a Scottish appeal.
6 Sep 2026

depart

The Practice Statement's own verb: to leave an earlier decision standing where it is and walk away from it. The Statement never says "overrule".
Paper 2, sentence by sentence.
13 Sep 2026

discover / invent

To discover is to find what was already there; to invent is to make what was not. The declaratory question in one pair of verbs.
Atkin "discovered" a principle — or chose one? 13 Sep.
13 Sep 2026

Discuss

An essay instruction, not a polite invitation. It means: take a position, argue it, and deal with the strongest objection to it. Do not merely describe both sides.
The last word of the 16 August question.
16 Aug 2026

dissent

To disagree with the majority in a separate judgment. Binds nobody; shows exactly what the majority had to overcome.
Buckmaster and Tomlin in Donoghue.
12 Sep 2026

distinguishing

Arguing that an earlier case does not apply here, because its material facts are different. The main way a court escapes a precedent without overruling it.
One of your three Level 1 exit tests: distinguish a case on its facts, unprompted.
16 Aug 2026

edn

Short for edition, in a citation. "(17th edn, Sweet & Maxwell 2020)" = the 17th edition, published by Sweet & Maxwell in 2020.
Reading item 3.
16 Aug 2026

evidence

Uncountable: "the evidence is strong", never "evidences".
Your Tramways brief.
17 Sep 2026

floodgates

The argument that allowing this claim will let in an unmanageable number of others.
Tomlin's ground in Donoghue — not Buckmaster's, whose ground was authority.
12 Sep 2026

formalism

The opposite view: that rules genuinely decide cases, and applying them is a mechanical exercise.
Same chapter title as above.
16 Aug 2026

glance

A quick, careless look. Not the verb for reading a judgment.
"have a glance at" — 17 Sep.
17 Sep 2026

hierarchy (of courts)

The ladder from the magistrates to the Supreme Court. A court is bound by decisions of the courts above it.
Cross & Harris, ch 1.
13 Sep 2026

HL

House of Lords — until 2009 the highest court in the UK. Replaced by the Supreme Court (UKSC).
"Donoghue v Stevenson [1932] AC 562 (HL)".
16 Aug 2026

idiom / idiomatic

An idiom is a fixed phrase whose meaning is not the sum of its words. Idiomatic English is what a native speaker would actually say.
"A word is known by the company it keeps."
13 Sep 2026

implicit

Implied but not stated. The word you reach for when the text has run out — and the tutor hears it as such.
"To the citizen. It is implicit." — 12 Sep.
12 Sep 2026

implied licence

A fiction: treating a trespasser the occupier knew about as if permitted, so as to owe him a duty. Diplock: "the fiction of a so-called licence".
The Addie–Herrington years.
13 Sep 2026

invitee / licensee / trespasser

Dunedin's three categories of entrant in Addie; the duty owed fell with each step, to almost nothing for the trespasser.
Addie v Dumbreck.
13 Sep 2026

judgment

The court's decision and reasons. Note the spelling: in law it is judgment, never judgement.
Every case you will read.
16 Aug 2026

judgment (spelling)

In law, always without the middle e. Judgement is the everyday spelling; a lawyer never uses it for a court's decision.
Your Tramways brief.
17 Sep 2026

leeway of choice

Stone: the range the legal materials leave open, within which the judge must choose and the law does not dictate.
Stone 1959, 1964, 1969.
13 Sep 2026

legal fiction

Something a court treats as true in order to reach a result, while everyone knows it is not.
The implied licence.
13 Sep 2026

level of generality

How wide or narrow a fact or rule is stated: a dead snail, a foreign body, a defect. Stone's ladder; the later court picks the rung.
Your clear-glass answer, 13 Sep: "This is Julius Stone."
13 Sep 2026

Lord Chancellor

Then the head of the judiciary, presiding in the Lords. Halsbury (1898), Hailsham (1929), Gardiner (1966) — it was Gardiner, not Reid, who read the Statement.
"Reid" for Gardiner, 17 Sep.
17 Sep 2026

Lords of Appeal in Ordinary

The salaried Law Lords who actually heard appeals in the House.
The Statement was read "on behalf of himself and the Lords of Appeal in Ordinary".
13 Sep 2026

material facts

The facts that actually mattered to the outcome. Changing one would change the decision. Facts that are not material are ignored when finding the ratio.
"the ratio is fixed by the material facts and the decision on them" — the orthodox position.
16 Aug 2026

open texture

Hart: every general word in a rule has a core of settled meaning and a fringe where applying it is a choice.
The Concept of Law, ch 7. You named it on 13 Sep and never used it.
13 Sep 2026

overruling

A higher court declaring that an earlier decision was wrong and is no longer law. Stronger than distinguishing.
Socratess holds that "the existence of overruling proves something was fixed."
16 Aug 2026

practice (of a court)

What a court habitually does about its own procedure and its own past decisions; made by the court, changeable by the court. Not practical, which means useful.
The Statement: "modify their present practice". Your Tramways brief.
17 Sep 2026

Practice Statement 1966

The announcement by which the House of Lords freed itself to depart from its own past decisions. Before it, it was bound by them forever.
Reading item 2, and the whole topic of the set that follows.
16 Aug 2026

precedent

The rule that courts must follow the decisions of higher courts in similar cases. "The doctrine of precedent."
"Is the doctrine of precedent a myth?"
16 Aug 2026

relevancy

Scots term: whether the claim would succeed even if every fact in it were true. The English equivalent is striking out for disclosing no cause of action.
Donoghue went up on relevancy — a point of law on assumed facts.
6 Sep 2026

retrospective

Reaching backwards in time. A court's change in the law alters the position of things already done on the old law. The Statement's stated danger.
Paper 2, paragraph three.
13 Sep 2026

rule of law / rule of practice

A rule of law binds a court from outside — statute, or a higher court. A rule of practice is the court's own habit about itself. Which the 1898 rule was is the whole Precedent question.
Your position on Tramways, 17 Sep.
17 Sep 2026

rule-scepticism

The view that legal rules do not really decide cases — judges decide, then dress it up as rules.
Hart, ch. 7, "Formalism and Rule-Scepticism". Socratess calls it "a disappointed absolutism".
16 Aug 2026

sentiment

Feeling or opinion. Atkin's "general public sentiment of moral wrongdoing" is the ground of liability, which he immediately restricts; it is not a rule of decision.
Your "third ratio", 23 Aug; the sentence before the neighbour passage, 12 Sep.
23 Aug 2026

sovereignty (of Parliament)

Parliament can make or unmake any law — including a court's internal rule about itself. It does not stop at the door of the House.
Your closing overreach, 17 Sep.
17 Sep 2026

speech

In the House of Lords, a judge's judgment was called a speech, not a judgment. A false friend — it is a written legal ruling, not a talk.
"Lord Atkin's speech in full" — reading item 1.
16 Aug 2026

term of art

A word with a fixed technical meaning inside law, different from its ordinary meaning. The dangerous ones look ordinary. See the Terms of Art page.
Your request, 17 Sep.
17 Sep 2026

the flip

House rule: arguing the side you disbelieve at full strength. Structural in every final hour.
Refused 23 Aug — the recorded wound.
23 Aug 2026

the manufacturer's rule (Donoghue, Atkin)

The narrow rule at the end of Atkin's speech: a manufacturer who sells products in a form showing they are meant to reach the consumer as they left him, with no reasonable possibility of intermediate examination, and knowing that lack of care will injure the consumer, owes the consumer a duty to take that care. Six conditions; he stated it whole from notes on 13 Sept 2026.
Calling question, at his request: If the bottle had been clear glass, which words in Atkin's rule would the manufacturer point to?
13 Sep 2026

the merits

The substance of a case, as opposed to procedural or preliminary points.
Sir Robert Reid raised the precedent point before the merits in Tramways.
13 Sep 2026

though / tough

Though means although. Tough means hard.
"this is though" — 12 Sep.
12 Sep 2026

treat

Transitive: you treat a thing, you do not "treat with" it.
"treated with the wording" — 17 Sep.
17 Sep 2026

unqualified

Without qualification: absolute, flat, unhedged. Not "not qualified enough".
Halsbury on St Leonards; inverted twice on 17 Sep.
17 Sep 2026

verification

The two questions from the primary source that open every hour. Two failures convert the hour to a supervised reading.
Every hour since 30 Aug.
30 Aug 2026

vexed (question)

Long disputed and still unsettled. The word you meant by "weaked".
17 Sep.
17 Sep 2026

wonder / wander

To wonder is to ask yourself something. To wander is to walk with no direction.
"you made me wander" — 17 Sep.
17 Sep 2026

61 terms.

Terms of Art

Updated after every session. Last revised 17 September 2026.

Let me be clear about what a term of art is, because the phrase is itself one. A term of art is a word that carries a fixed technical meaning inside a field — here, the law — that is different from, and usually narrower than, its meaning in ordinary English. Material does not mean physical. Distinguish does not mean tell apart. Practice does not mean rehearsal. The dangerous ones are the ones that look ordinary, because the ordinary sense is always available to you, always plausible, and always wrong.

Here is why this matters in a self-help system. Terms of art are the great powers of the vocabulary. Each one carries a capability that ordinary words do not: when you say obiter, you are not describing a remark, you are stripping it of authority. When you say material, you are not describing a fact, you are asserting that the decision turns on it. Deploy the term correctly and the other side must either accept the consequence or contest the classification. Deploy it in its ordinary sense and you have handed the other side a free attack — a self-inflicted loss, with nobody to blame.

So every entry below has four parts. What the term means in law. The trap — the ordinary sense that will get you killed. How to deploy it: offensively, to force the other side onto the technical ground, and defensively, to hold your own. And where it came up on your record, because a term you have already misused is a term you know the shape of.

ratio decidendi

In law it means

The rule of law on which the decision was founded, treated as necessary to the result on the material facts. The only part of a judgment that binds.

The trap

Ordinary sense: "the reasoning". The ratio is not the reasons the judge gave; a judge can give bad reasons for a right decision.

How to deploy it

Offensively: when the other side quotes a passage, ask whether the decision needed it. If not, it is obiter and it binds nobody. Defensively: state your ratio in Goodhart's form — material fact plus decision — and name the rung you are stating it at, so nobody can move it on you.

On the record

You said "public sentiment" was a third ratio in August. On Goodhart's method it fails at the first move: no material fact grounds it.

obiter dictum

In law it means

A thing said by the way: not necessary to the decision. Persuasive, never binding.

The trap

Ordinary sense: "a side remark", "less important". Obiter can be the most important sentence in the judgment — the neighbour principle is obiter — and still bind nobody.

How to deploy it

Offensively: the classification strips authority; use it when the other side leans on a passage the decision did not need. Defensively: never say "abused" of an obiter later courts adopted — it assumes the answer. Say "adopted" and argue whether they were free to.

On the record

"The neighbour principle was only an obiter … used and abused." 13 Sep.

material (fact)

In law it means

A fact the judge treated as making a difference to the result. Test by removal: absent that fact, would the decision have had to differ?

The trap

Ordinary sense: physical, tangible, important. A material fact is often trivial in itself — an opaque bottle — and a dramatic fact is often immaterial.

How to deploy it

Offensively: run the removal test on the other side's stated ratio; a fact they cannot remove without changing the result is one they must defend. Defensively: name your material facts before the hypotheticals arrive, so the clear-glass bottle finds you ready.

On the record

You reached "an earlier decision of this House on the same point" only on the fourth putting, 17 Sep. Goodhart's presumption — person, time, place, kind, amount immaterial unless treated otherwise — is the shortcut.

distinguish

In law it means

To hold that an earlier case does not govern this one because a material fact of the earlier case is absent here. The case stays binding; it is stepped off.

The trap

Ordinary sense: to tell two things apart. In law you distinguish a case, not two things, and the earlier case remains good law.

How to deploy it

Offensively: when the other side distinguishes, ask which material fact is absent and whether the earlier court treated it as material. A distinction on an immaterial fact is a disguised departure — Lord Reed's "judicial gymnastics". Defensively: it is the cheapest escape from a precedent you cannot overrule; use it before you reach for "wrongly decided".

On the record

Your peg analogy, 13 Sep: distinguishing leaves the peg and steps off. Right. Reid's test for the limit: development stops where you would have to say the earlier case was wrongly decided.

overrule

In law it means

A court with the power to do so declares an earlier decision no longer law. Only a higher court, or the same top court since 1966.

The trap

Ordinary sense: to override, to overrule an objection. Lower courts cannot overrule; they distinguish. And overruling a decision is not the same as rejecting its further reasoning — Burrows's point.

How to deploy it

Offensively: "Is that overruling, or distinguishing?" forces the other side to say which power they claim. Defensively: Wilberforce and Morris reached Herrington without overruling; Reid said that was impossible. Know which Lord you are standing with.

On the record

Five Lords, one result, three accounts of whether Addie was overruled.

depart

In law it means

The Practice Statement's verb: to leave an earlier decision standing and not follow it. Softer than overrule; the Statement never says overrule.

The trap

Ordinary sense: to leave. The softness is deliberate; do not read it as timidity.

How to deploy it

Offensively: the Statement's own word is "depart when it appears right" — an open discretion; make the other side supply the criteria, which are not in the text. Defensively: cite Reid's guidelines as the content the judges gave it.

On the record

Paper 2; Paterson.

bound / binding

In law it means

A court is bound when it must follow an earlier decision whether or not it agrees. Binding is the ordinary force of precedent within the hierarchy.

The trap

Ordinary sense: tied up, unable to move. A bound court can still distinguish, restate narrowly, or say it disagrees. Bound is not paralysed.

How to deploy it

Offensively: ask "bound to what?" — the narrow rule or the wide one — and watch the other side pick a rung. Defensively: answer that question once, in one sentence, and stay there. Five answers is zero answers.

On the record

Five answers to one word, 13 Sep.

conclusive

In law it means

Halsbury's word: the matter is closed and may not even be raised. Stronger than binding.

The trap

Ordinary sense: decisive, convincing. In Tramways it is a term for finality, not for persuasiveness.

How to deploy it

Offensively: a court that calls its own decisions "conclusive" and then modifies its "practice" has used two vocabularies; make the other side choose which the decision rests on. Defensively: keep the label apart from the fact — the earlier decision was called conclusive; that is Halsbury's characterisation, not a fact about it.

On the record

Your Tramways brief; the two-objects distinction of 17 Sep.

practice (of a court)

In law it means

What a court habitually does about itself — its procedure, its past decisions. Made by the court, alterable by the court.

The trap

Ordinary sense: rehearsal, or "practical" meaning useful. You have said "practical rule" three times. It is a rule of practice.

How to deploy it

Offensively: if the 1898 rule was practice, the 1966 Statement was an act of the same kind by the same body — the first horn in one move. Defensively: if it was law, say what made it law, since no statute and no higher court imposed it.

On the record

"Modify their present practice." 17 Sep, first answer of the evening — right.

precedent

In law it means

An earlier decision treated as authority for a later one. In England: a single decision of a higher court binds; on the Continent: a settled line persuades.

The trap

Ordinary sense: an example, a first occurrence. "Setting a precedent" in ordinary speech is not the doctrine.

How to deploy it

Offensively: ask whether the other side means the doctrine (binding single decisions) or the habit (following past cases), because the question "is precedent a myth" has a different answer for each. Defensively: define which you mean in your first sentence.

On the record

Goodhart's "series or group of cases creating a practice" is the contrast you need.

authority

In law it means

A source a court must or may rely on: a binding case, a persuasive case, a statute. "Authority for the proposition that…"

The trap

Ordinary sense: power, an official. In an essay, "authority" means the case you cite, and a claim without one is an assertion.

How to deploy it

Offensively: "What is your authority for that?" is the shortest question in the room. Defensively: every bold claim is your best-authorised claim, not your only unauthorised one — the 59 mark was for exactly this.

On the record

August essay: the boldest claim was the only one without authority.

hold / held

In law it means

What a court decides as a rule of law. "The House held that…" introduces the ratio.

The trap

Ordinary sense: to keep, to grasp. A court does not hold a fact; it treats a fact as material and holds a rule.

How to deploy it

Offensively: when the other side says "the court held", ask them to finish the sentence with a rule, not a fact. Defensively: the sentence has a shape — "Where [material fact], the court held [decision]" — use it and it cannot be misread.

On the record

"The House held the already decided point of law as a material fact." 17 Sep — the verbs crossed.

relevancy

In law it means

Scots: whether the claim would succeed if every fact in it were true. A point of law decided on assumed facts.

The trap

Ordinary sense: relevance, pertinence. Nothing to do with it.

How to deploy it

Offensively: a case decided on relevancy has no found facts — so any material-facts ratio rests on assumed facts, which the other side must admit. Defensively: it is why Donoghue's ratio is a choice between two passages, not a finding.

On the record

Your best insight in August: no trial, averments pro veritate.

averment

In law it means

A fact alleged in the pleadings. Not proved; alleged.

The trap

Ordinary sense: none — it looks like "avert" and is unrelated.

How to deploy it

Pair it with pro veritate: "the averments were taken pro veritate" says in five words that the whole case ran on assumed facts.

On the record

Donoghue.

per incuriam

In law it means

Decided in ignorance of a binding authority or statute. One of three grounds on which the Court of Appeal may refuse to follow itself.

The trap

Ordinary sense: none; but do not use it to mean "wrongly decided". A wrong decision is not per incuriam unless the court missed something binding.

How to deploy it

Offensively: it is an exception with a narrow gate; if the other side calls a case per incuriam, ask what binding thing was missed. Defensively: Halsbury's mistake-of-fact exception is its ancestor — and he shut every other door.

On the record

Cross & Harris; Young v Bristol Aeroplane.

res integra

In law it means

An untouched question — never decided, open to be argued from scratch.

The trap

Ordinary sense: none. Do not confuse with "integrity".

How to deploy it

Halsbury: a decided point is never again res integra. Use it to say, in two words, that a question is closed.

On the record

Tramways, second movement.

open texture / core / penumbra

In law it means

Hart: every rule has a core where it plainly applies and a fringe where its application is a choice. Rules bind in the core; judges choose at the edge.

The trap

Ordinary sense: fabric; shadow. And the trap of the sceptic: treating the fringe as if it were the whole.

How to deploy it

Offensively: against "bound in theory, free in reality" — the choice at the edge does not dissolve the rule at the core; fourteen departures in forty-three years is a core holding. Defensively: it is the instrument that lets you hold "bound" and "leeway" in one hand. Reach for it.

On the record

Named at your second answer on 13 Sep; never used when it was the exact answer twenty minutes later.

leeway of choice

In law it means

Stone: the range the materials leave open, within which the judge must choose.

The trap

Ordinary sense: slack, tolerance. Stone's leeway is not laxity; it is the structural gap between premises and conclusion.

How to deploy it

Offensively: every ratio is stated at a rung; the judgment does not fix the rung; the later court chose it. Defensively: Reid found a bottom to the ladder in Herrington — "wrongly decided" — so the leeway is bounded. Say where the bottom is.

On the record

Your clear-glass answer: "This is Julius Stone."

declaratory (theory)

In law it means

The claim that judges find and declare law that already exists; they do not make it. Reid: a fairy tale.

The trap

Ordinary sense: stating, announcing. The theory is a claim about the source of law, not about tone.

How to deploy it

Offensively: against "Atkin discovered a principle" — a thing discovered was there before; was it, in the cases? Defensively: if you take the declaratory line, own its consequence: the 1898 rule was also "discovered", and then 1966 declared it away.

On the record

"Cherry-picking masked as discovery." 13 Sep.

discuss (in a question)

In law it means

Take a position, argue it, and meet the strongest objection. Not describe both sides.

The trap

Ordinary sense: talk about. A "discussion" that surveys is a fail.

How to deploy it

The essay instruction is a command to choose. Choose, and pay.

On the record

Every question set.

I submit / with respect

In law it means

"I submit" introduces the advocate's contention, not a fact. "With respect" precedes disagreement with a judge.

The trap

Ordinary sense: give in; politeness. In court, "with respect" means "you are wrong".

How to deploy it

Offensively: "I submit" marks the sentence you will defend; use it once, on the claim that matters. Defensively: "with respect" lets you contradict Halsbury in an essay without sounding like a student who has not read him.

On the record

Not yet used. Use it on the 26th.

21 terms of art.

Latin

Every Latin or foreign phrase that has come up, with its literal meaning, its meaning in law, how it is said and used in a sentence, and where you met it. Updated after every session. Last revised 18 September 2026.

A word on why these get their own page. Latin in English law is not decoration and it is not a test of schooling; it is a set of fixed tokens that lawyers pass to each other because each one carries a whole rule in two or three words. Per incuriam is a sentence. Pro veritate is a paragraph. You do not need to know Latin. You need to know these tokens exactly — what each one means literally, what it means in law, and how it sits in an English sentence — because a mispronounced or misplaced one tells the other side you are holding a weapon you cannot fire.

culpa

Literally

Fault, blame

In law

Latin: fault, blameworthiness.

How it is said and used

KUL-pa. Atkin: negligence 'or treat it as in other systems as a species of culpa'.

Where it came up

Atkin: liability for negligence "or treat it as in other systems as a species of culpa". — 12 Sep 2026

interest rei publicae ut sit finis litium

Literally

It is in the public interest that there be an end to lawsuits

In law

Latin maxim: it is in the public interest that there be an end to lawsuits.

How it is said and used

Usually shortened to 'finis litium'. 'Halsbury's ground was finis litium.'

Where it came up

Halsbury's reason for the rule in Tramways. — 13 Sep 2026

jurisprudence constante

Literally

French: settled case law

In law

French: settled case law. A consistent line of decisions treated as strong evidence of the law; no single case binds. The Continental alternative to the English rule.

How it is said and used

zhoo-ris-proo-DAHNCE kon-STAHNT. 'On the Continent a single case persuades; jurisprudence constante has weight.'

Where it came up

Goodhart 1934; Cross & Harris. — 13 Sep 2026

obiter dictum

Literally

A thing said by the way

In law

Anything a judge says that was not necessary to the decision. Not binding — only persuasive. Plural: obiter dicta. Often just "obiter".

How it is said and used

OH-bit-er DIK-tum; plural obiter dicta. 'The neighbour principle was obiter.' Often just 'obiter'.

Where it came up

The natural opposite of ratio; you cannot define one without the other. — 16 Aug 2026

per incuriam

Literally

Through carelessness

In law

Latin, "through carelessness": a decision reached in ignorance of a binding authority or statute that would have changed the result. One of the three Young v Bristol Aeroplane exceptions.

How it is said and used

per in-KYOOR-ee-am. 'The decision was given per incuriam — the court had not been shown the 1957 Act.'

Where it came up

Cross & Harris, ch 1. — 13 Sep 2026

pro veritate

Literally

As if true

In law

Latin, "as if true": facts assumed to be true for the purpose of deciding a point of law.

How it is said and used

pro veh-rih-TAH-tay. 'The averments were taken pro veritate.'

Where it came up

Donoghue — the snail was never proved; the averments were taken pro veritate. — 6 Sep 2026

ratio decidendi

Literally

The reason for deciding

In law

The part of a judgment that is actually binding on later courts — the legal reason the case was decided as it was. Latin: "the reason for deciding". Often shortened to the ratio.

How it is said and used

ratio dess-ih-DEN-dye. 'The ratio of Donoghue is the manufacturer's rule.' Often just 'the ratio'.

Where it came up

The whole question set 16 August 2026: "The ratio decidendi of a case is not what the deciding court laid down." — 16 Aug 2026

res integra

Literally

An untouched thing

In law

Latin, "an untouched thing": a question no court has yet decided, so it may be argued from scratch. A decided point is never again res integra.

How it is said and used

rays in-TEG-ra. 'The point is not res integra — this House decided it in 1894.'

Where it came up

Halsbury in Tramways: impossible to raise the question again "as if it was res integra and could be reargued." — 13 Sep 2026

stare decisis

Literally

To stand by things decided

In law

The formal name for the doctrine of precedent. Latin: "to stand by things decided".

How it is said and used

STAH-ray deh-SY-sis. 'The English doctrine of stare decisis.' The formal name of the doctrine of precedent.

Where it came up

The underlying principle the 16 August question attacks. — 16 Aug 2026

sub silentio

Literally

In silence

In law

Latin, "in silence": a court passes a point without discussing it — or leaves a precedent behind without saying so.

How it is said and used

sub sil-EN-tee-oh. 'The House departed from Addie sub silentio.'

Where it came up

Your own answer: the Lords "departed silently" before 1966. — 13 Sep 2026

ultra vires

Literally

Beyond the powers

In law

Latin, "beyond the powers": an act the actor had no legal authority to do.

How it is said and used

UL-tra VY-reez. 'The Statement was ultra vires the House.' Also of companies and public bodies.

Where it came up

The second horn of the Precedent question — was the 1966 Statement ultra vires? — 13 Sep 2026

11 phrases.