Asked by Anonymous
No beer drinker is a vegan. John is a beer drinker. Therefore, John is not a vegan.
Is this valid or invalid. If valid, give a proof. If invalid, give a counterexample.
Is this valid or invalid. If valid, give a proof. If invalid, give a counterexample.
Answers
Answered by
oobleck
it is valid.
what do you think constitutes a proof?
You might start with a Venn diagram...
what do you think constitutes a proof?
You might start with a Venn diagram...
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