Comment Re:How does one tell the difference? (Score 3, Interesting) 103
Tool-making marks are quite distinctive. It's not a process that happens by accident, which is why you don't see naturally-created flint knives laying in riverbeds. If you look with a magnifying glass at a rock that has a sharp edge because it fell against another rock, and a rock that has a sharp edge because a human did it the difference is fairly obvious. Knowing which is which takes practice, of course.
It's unlikely that a "primitive" 60,000 years ago would put an edge on a rock and then bury it in a level deep enough to be mistaken for 3,300,000 years ago, and even less likely that the disturbance of the burial would not be noticed. Even less likely that your phantasmagorical "primitive" would know how to fake the patina of an extra three million years of aging on the worked surface.
You really have no idea how paleontologists and anthropologists work, do you?