Adriingashley9847 Adriingashley9847
  • 03-11-2017
  • Social Studies
contestada

What rules of inference are used in the given below argument? "no man is an island. manhattan is an island. therefore, manhattan is not a man."?

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ahmedishaal ahmedishaal
  • 14-11-2017
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.

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