major premiss

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major premiss

A student writes the major premiss on a whiteboard during a logic lesson.

Definition
  1. Noun:
    • The premise of a syllogism that contains the major term: In formal logic, a "major premiss" is the first statement in a categorical syllogism. It is the premise that includes the major term, which is the predicate of the conclusion.
Usage
  • The "major premiss" is a foundational concept in Aristotelian logic, used to construct a valid deductive argument. It is always paired with a minor premiss to lead to a conclusion.
  • It is used in academic, philosophical, and mathematical contexts when discussing logical structures and argument forms.
Examples
  • Noun:
    • In the syllogism "All men are mortal; Socrates is a man; therefore, Socrates is mortal," the statement "All men are mortal" is the major premiss.
    • Identifying the major premiss is the first step in analyzing the validity of a syllogistic argument.
Advanced Usage
  • "to serve as the major premiss": to function as the premise containing the conclusion's predicate.
    • The universal affirmative statement "All planets orbit a star" can serve as the major premiss in an astronomical argument.
Variants and Related Words
  • Major premise: A more common modern spelling variant of "major premiss." The meaning is identical.
    • Some logic textbooks use the spelling "major premise" instead.
  • Premiss (noun): An alternative, chiefly British, spelling for "premise," meaning a statement or proposition from which another is inferred.
  • Syllogism (noun): A form of reasoning in which a conclusion is drawn from two given or assumed propositions (premises).
  • Major term (noun): The predicate term of the conclusion of a syllogism, which also appears in the major premiss.
Synonyms
  • Major premise: The direct synonym with alternative spelling.
  • First premise: In the standard order of a syllogism, it is often the first stated premise.
Notes on Meaning
  • The term is highly specific to the field of formal logic. It does not have common everyday meanings.
  • The concept is integral to understanding classical deductive reasoning, where the "major premiss" establishes a general rule or principle.
major premiss

A student writes the major premiss on a whiteboard during a logic lesson.

Noun
  1. the premise of a syllogism that contains the major term (which is the predicate of the conclusion)

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