- Socrates is mortal, since all men are mortal.
It is understood that Socrates is a man. The fully expressed reasoning is thus:
- Since all men are mortal and Socrates is a man, Socrates is mortal.
In this example, the first two independent clauses before the comma (namely, "all men are mortal" and "Socrates is a man") are the premises, while "Socrates is mortal" is the conclusion.
In logic, an argument requires a set of two declarative sentences (or "propositions") known as the premises, with another declarative sentence (or "proposition") known as the conclusion. This structure of two premises and one conclusion forms the basic argumentative structure.
More complex arguments can use a series of rules to connect several premises to one conclusion, or to derive a number of conclusions from the original premises. An example of this is the use of the rules of inference found within symbolic logic.
- "Argument: a sequence of statements such that some of them (the premises) purport to give reasons to accept another of them, the conclusion" : The Cambridge Dictionary of Philosophy. 2nd ed, Cambridge University Press. p43
- Gullberg, Jan Mathematics from the birth of numbers. Norton, New York. 216 ISBN 039304002X ISBN 978-0393040029