A Human says what?

[mediocrates]

I think we can all agree that during mass extinction events of the past no humans were present to survive or succumb to the adverse conditions. 

At the same time, we can agree that the evolutionary ancestors of humans must have been present and must have survived.

The only point left to argue is if humans could have survived if they were present... I say maybe. Our survival strategies would differ depending on our stage of development though. Modern humans would obviously die instantly.