Necessity and sufficiency - Wikipedia
网页In logic and mathematics, necessity and sufficiency are terms used to describe a conditional or implicational relationship between two statements. For example, in the conditional statement: "If P then Q ", Q is necessary for P, because the truth of Q is guaranteed by the truth of P. (Equivalently, it is impossible to have P without Q, or the ...
2.3: Necessary and Sufficient Conditions - Humanities LibreTexts
网页A necessary condition is something that must obtain if something else is to obtain. It means if that for which it is a necessary condition obtains, then it must also obtain/have obtained. If X is a necessary condition for Y, then any time Y obtains, X must also obtain.
The Concept of Necessary Conditions and Sufficient Conditions
网页Definition: A condition A is said to be necessary for a condition B, if (and only if) the falsity (/nonexistence /non-occurrence) [as the case may be] of A guarantees (or brings about) the falsity (/nonexistence /non-occurrence) of B.
Necessary Condition - Vocab, Definition, and Must Know Facts
网页Necessary Condition. A necessary condition is a requirement that must be met in order for a certain outcome or event to occur. It is a fundamental concept in logic and formal reasoning, where it is used to establish the conditions under which a statement or proposition is true.
Necessary and Sufficient Conditions – Introduction to …
网页5 Necessary and Sufficient Conditions. Michael Shaffer. The concepts of necessary and sufficient conditions play central and vital roles in analytic philosophy. For example, being an unmarried male is a necessary condition for being a bachelor and being a bachelor is a sufficient condition for being an unmarried male.
Necessary condition Definition & Meaning - Merriam-Webster
网页1. : a state of affairs that must prevail if another is to occur : prerequisite. 2. : a proposition whose falsity assures the falsity of another. Examples of necessary condition in a …
3.2: Necessary and Sufficient Conditions - Humanities LibreTexts
网页And one sentence is a necessary condition for a second if the truth of the second sentence is required—is needed, is necessary—for the truth of the first sentence. For example, paying your tuition fees is a necessary condition for graduating.
Necessary Condition - Vocab, Definition, and Must Know Facts
网页A necessary condition is a situation or requirement that must be present for a particular outcome or event to occur. In logic, if a condition is necessary, it means that without it, the conclusion cannot be true, although its presence alone does not guarantee the conclusion.
5: Necessary and Sufficient Conditions - Humanities LibreTexts
网页The concepts of necessary and sufficient conditions play central and vital roles in analytic philosophy. For example, being an unmarried male is a necessary condition for being a bachelor and being a bachelor is a sufficient condition for being an unmarried male.
5.2 Logical Statements - Introduction to Philosophy - OpenStax
网页Necessary and Sufficient Conditions. All conditionals express two relations, or conditions: those that are necessary and those that are sufficient. A relation is a relationship/property that exists between at least two things.
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