Question

Suppose that the following proposition is true:The grass is green therefore squirrels can fly(a) You discover that squirrels cannot fly. Can you conclude anything about the grass?(b) You discover that the grass is not green. Can you conclude anything about squirrels?

Answer 1

(a) The grass is not green.

(b) Nothing can be concluded about squirrels.

Explanation:

(a) If squirrels cannot fly, then the you can conclude that the grass is not green, because if the grass was green, then squirrels would be able to fly.

(b) By discovering that the grass is not green, nothing can be concluded regarding squirrels. The statement says that squirrels can fly if the grass is green which doesn't necessarily mean that they can't fly if the grass is not green.