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1) If an argument is valid and all of its premises are true in the actual circum

ID: 3110776 • Letter: 1

Question

1) If an argument is valid and all of its premises are true in the actual circumstance, then it is sound.

a) Only sometimes true.

b) Never true.

c) Always true.

2) Every tautology is a logical necessity.

a) True

b) False

3) Every logical necessity is a tautology.

a) True

b) False

4) If the conclusion of an argument is a tautology, then the argument is valid.

a) Only sometimes true.

b) Never true.

c) Always true.

5) If one of the premises in an argument is the negation of a tautology, then the argument is valid.

a) Only sometimes true.

b) Never true.

c) Always true.

Explanation / Answer

1) a

2). a

3) a

4). a

5) b

The above are the answers for questions.

These are basically interrelated questions.