What rules of inference are used in the given below argument? "no man is an island. manhattan is an island. therefore, manhattan

Question

3 years ago

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is not a man."?

1 answer:

iren2701 [21] · Answer 1 · 2021-12-30T09:53:42+03:00

There are three rules of inference are used in the sentence.

1) Universal Instantiation, if x is a man, then x is not an island” and “If Manhattan is a man, then Manhattan is not an island.”

2) Contrapositive, If Manhattan is an island, then Manhattan is not a man.”

3) Applying modus ponens or modus tollens. We derive the result that Manhattan is not a man.