In the expression p ↔ q, what does it mean?
Understand the Problem
The question is asking about the meaning of the logical expression p ↔ q, and it provides multiple choice options to clarify its interpretation in propositional logic.
Answer
p if and only if q
The expression p ↔ q means 'p if and only if q'.
Answer for screen readers
The expression p ↔ q means 'p if and only if q'.
More Information
In logic, 'p if and only if q' emphasizes that both propositions must simultaneously be true or false.
Tips
Confusing biconditional with implication is common. Remember 'if and only if' for the biconditional.
Sources
- P ↔ q - Vocab, Definition, and Must Know Facts | Fiveable - library.fiveable.me
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