Which counterexample shows that the conjecture All mammals are monkeys is false

A mouse is a mammal, but it us not a monkey.

Counter example to show that given conjecture is false.

Step-by-step explanation:

We are given a conjecture:

All mammals are monkeys.

We have to provide a counter example to show that this conjecture is false.

Since elephants are mammals, thus it will lie in the set of all mammals.

So we can write:

Elephants are monkeys which is false as it is obvious that elephants are not monkeys.

Hence, the given conjecture is false that all mammals are monkeys.