I'm assuming you're not a geneticist, so you probably didn't verify that the bones that were stacked nicely into a skeleton actually came from the same being. You likely weren't part of the dig team that found them. You don't know where they came from, or even if they are actual bone. And I'm not even talking about people purposely misleading us, but rather the fact that we have to take at face value what we are told. That's blind faith. We both _assume_ we could dig and verify the facts (with enough time, money and education), but we don't -- we just believe.
My argument is the 'evidence' we think we have, is nothing more than blind faith in 99% of the time, simply because we don't have the time and resources to follow up on everything. We simply believe because everyone else does.