1. Statements: All fish are tortoise. No tortoise is a crocodile. Conclusions: No crocodile is a fish. No fish is a crocodile.
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By: guest on 02 Jun 2017 01.28 am
Since both the premises are universal and one premise is negative, the conclusion must be universal negative. Also, the conclusion should not contain the middle term. So, II follows; I is the converse of II and thus it also holds.