Question

Use a Venn diagram to test the argument below for validity. According to the Venn diagram, is this argument valid or invalid?

Just need to confirm the answers are correct


1. Some logicians are lawyers. All lawyers are extemporaneous speakers. So, some extemporaneous speakers are logicians.

My answer: invalid

2. All chariot racers are musicians. Some chariot racers are soldiers. Therefore, some musicians are soldiers.

My answer: valid

3. All philosophers are lovers of truth. No lovers of truth are closed-minded people. Thus, no philosophers are closed-minded people.

My answer: invalid

4. All goats are cute. All small mammals are cute. So, all small mammals are goats.

My answer: invalid

5. Some musicians are not poets. All musicians are happy persons. Therefore, some happy persons are not poets.

My answer: valid

Answer 1

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