If humans evolved from monkeys, then why are there still monkeys?
Oh, it's simple. This is because there was a huge error when scientists explained humans evolved from monkeys. The reality is they were trying to say that we evolved from mankeys and not monkeys.
Therefore there is not such thing as "primate" either. Its real name is, as a matter of fact, "primeape".
Therefore there is not such thing as "primate" either. Its real name is, as a matter of fact, "primeape".