If No metals are gases is given as false, then which of the following statements can be immediately inferred to be true?

1.All gases are metals

2.All metals are gases

3.Some metals are not gases

4.Some metals are gases

A3 & 4 only

B1 & 2 only

C4 only ✓ Correct

D1 & 4 only

Correct answer: (C) 4 only

Explanation

Some metals are gases is the only statement that can be inferred true.

No metals are gases is the E proposition declared false.

The contradictory of E is the particular affirmative I.

A false E makes its contradictory I true, giving Some metals are gases.

The two universals and the O form stay undetermined and cannot be affirmed.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.