Premises and a Conclusion
An argument is a set of premises offered in support of a conclusion, which is exactly what separates reasoning from mere opinion. · 10 min
In ordinary talk, an argument is a quarrel. In philosophy it is something calmer and far more useful: a set of statements in which some, the premises, are offered as reasons to accept another, the conclusion. “Capital punishment is wrong” is not yet an argument — it is a claim, and someone could just insist on the opposite. It becomes an argument the moment you attach a reason: “…because the state should never deliberately kill, and an execution does exactly that.” Now there is something to examine, agree with, or push back on. This folio teaches you to find those parts, because you cannot weigh reasoning you cannot yet see.
Guess before you learn
Which of these is an argument, rather than just a claim or a feeling?
The first states a position with nothing behind it; the third reports how someone feels. Only the middle one offers reasons — the hours lost, the value of rest — for the claim it makes. Those reasons are what you can test. If you picked the first, notice that it might be correct; it is simply not yet an argument, because it gives you nothing to weigh.
9–12
3–5
An argument has two parts inside it. One part is the point you are trying to make — the conclusion. The other part is the reasons you give for it — the premises. “We should leave now, because the last bus comes at six” has both: the point is leave now, and the reason is the bus comes at six.
Small words give the parts away. Because, since, and for usually come just before a reason. So, therefore, and that is why usually come just before the point.
6–8
An argument is a set of statements in which some, the premises, are offered as reasons to accept another, the conclusion. A lone claim — “The library should stay open later” — is not yet an argument. Add support and it becomes one: “The library should stay open later, because many students have nowhere quiet to work after their jobs.” The premise is the reason; the conclusion is the claim it backs.
Indicator words help you find the parts. Because, since, for, and given that usually flag a premise. Therefore, so, thus, and hence usually flag a conclusion. To lay an argument bare, restate it as a short list of premises with the conclusion last — a form plain enough to judge.
9–12
To standardize an argument is to rewrite it as a numbered list of premises with the conclusion beneath, stripped of repetition and rhetoric. Ordinary prose hides the structure; standardizing exposes it. Take “Since every citizen deserves a vote, and prisoners are still citizens, they too deserve the vote.” Standardized: (P1) Every citizen deserves a vote. (P2) Prisoners are citizens. (C) Prisoners deserve the vote.
The aim is not tidiness but exposure. Once the premises are listed, you can ask the two questions that matter: are the premises true, and do they actually support the conclusion? A claim merely repeated more loudly answers neither. This is the difference between reasoning and mere opinion — an opinion hands you a conclusion with no premises attached, so there is nothing to test.
K–2
“I should get a cookie” is just a wish. “I should get a cookie because I ate all my carrots” gives a reason. A reason, plus the thing you want to show, makes an argument.
The reason is called the premise. The thing you want to show is the conclusion. The little word “because” points right at the reason.
Undergrad
In the logician’s sense an argument is a structured object: a set of premises advanced as grounds for a conclusion. Reconstructing one from natural-language prose is a skill in itself, because ordinary speech routinely omits steps. “She’s a citizen, so she can vote” suppresses the general premise — that citizens may vote — which the inference actually needs; an argument with an unstated premise is an enthymeme. Charitable reconstruction is governed by a norm: supply the missing premise the arguer would most plausibly accept, and the one that makes the inference strongest, not weakest. To insert a premise no one would grant is to attack a position its holder never took. Naming premises is therefore also an ethic of reading.
Postgrad
The premise/conclusion pair is the atom of logical theory, but its extraction from discourse raises questions logic proper sets aside. Which utterances even express arguments, as opposed to explanations, narrations, or conditional assertions? “The bridge failed because the bolts corroded” explains an event rather than arguing for a conclusion; one “because” serves both inference and causation, and only context tells them apart. Argumentation theory after Toulmin enriches the bare pair with warrant, backing, qualifier, and rebuttal — machinery for support that is defeasible rather than deductive. For an introduction the two-part skeleton suffices, but it is worth knowing it is a simplification: real reasoning carries its exceptions with it, and a mature analysis marks where a premise holds only presumably.
premise
A statement offered as a reason to accept a conclusion. Every argument needs at least one; the conclusion is the claim the premises are meant to support.
Why is this true?
Why isn’t a bare claim, however strongly felt, an argument?
Because an argument offers reasons that can be examined, and a bare claim offers none. Feeling sure is not the same as giving a premise. Without a premise there is nothing for anyone — including you — to test, so no reasoning has taken place.
Standardize: “Since exercise lowers stress, and lower stress helps you sleep, exercise helps you sleep.” — the steps fade as you master them
Conclusion: Exercise helps you sleep.
P1: Exercise lowers stress.
P2: Lower stress helps you sleep.
P1 Exercise lowers stress. P2 Lower stress helps you sleep. So, C exercise helps you sleep.
One more skill finishes the anatomy: spotting the premise nobody said aloud. “She is a citizen, so she may vote” sounds complete, but it leans on an unstated rule — that citizens may vote — without which the reason does not reach the conclusion. Most everyday arguments hide a step like this. Finding it is not a trick to win a debate; it is how you check whether an argument really holds, and it is a courtesy too — you supply the missing premise the speaker would most likely accept, then judge the argument at its strongest.
Seeing an argument is the first half of thinking about one; the second half is judging it. You now have the parts in hand: premises, a conclusion, the words that flag them, and the hidden premise that quietly does the work. The next folio asks the harder question — when do the premises actually force the conclusion, and when do they merely sit near it? That is the difference between an argument that looks convincing and one that is.
Practice — new ink and old, interleaved
1.In “The recipe must be doubled, for twelve guests are coming and it serves only six,” what is the conclusion?
2.Order into standard form: “Whales are mammals, and no fish is a mammal, so no whale is a fish.”
- Whales are mammals.
- No fish is a mammal.
- Therefore, no whale is a fish.
3.Name the hidden premise in “Dana is a doctor, so Dana studied for years.”
4.Without looking back: what is an argument, and what does it mean to standardize one?
An argument is a set of premises offered in support of a conclusion. To standardize it is to rewrite it as a numbered list of premises with the conclusion last, so its structure can be judged.
How close were you? Grade yourself honestly — it sets your review date.