Stage 35 · Logic & Quantifiers

35.2.5 Identifying the Type of Condition

35.2 Sufficient, Necessary, and Both

Point 5 of 5

35.2.5 Identifying the Type of Condition

Core idea

Check each direction once: see whether p⇒q, q⇒p, or both, and call it sufficient, necessary, or both.

Module goal. Capture the relationship between hypothesis and conclusion with "is it enough to have it, can you do without it" — and learn to identify all three kinds of conditions.

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