Question

Which statement is a counterexample to the following conjecture?

All mammals are dogs.

A. A labrador retriever is a mammal.

B. All mammals have hair.

C. A spider is not a mammal.

D. A cat is a mammal.

Answer 1

c a spider is not a mammal

Explanation:

i mean not all dogs r mammals i mean common sense

Answer 2

D. A cat is a mammal.

Explanation:

Reason being is because a cat isn't a dog, yet it's still a mammal.