p → q is logically equivalent to ________ ans. ¬p ∨ q ¬p ∨ ¬q p ∨ ¬q ¬p ∧ q
Question
p → q is logically equivalent to ________ ans. ¬p ∨ q
¬p ∨ ¬q
p ∨ ¬q
¬p ∧ q
Solution
The logical equivalence of "p → q" is "¬p ∨ q". This is based on the definition of implication in logic. Here's the step by step explanation:
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"p → q" is an implication. It means "if p then q".
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The only way for an implication to be false is if the first part (p) is true and the second part (q) is false.
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Therefore, the implication is true in all other cases: if p is false, or if q is true.
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This is exactly what "¬p ∨ q" says: either p is not true (¬p), or q is true.
The other options are not logically equivalent to "p → q".
- "¬p ∨ ¬q" would mean "either p is not true, or q is not true", which is not the same as "if p then q".
- "p ∨ ¬q" would mean "either p is true, or q is not true", which is also not the same as "if p then q".
- "¬p ∧ q" would mean "p is not true and q is true", which is again not the same as "if p then q".
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