Discussion on answer by Sklivvz: Did hominids and dinosaurs ever coexist?

The existence of mammalian megafauna is best explained by the extinction of non-avian dinosaurs: newscientist.com/article/…

Let's ask a different question here: Assuming humanoids and dinosaurs existed at the same time, what caused one of them to go extinct and not the other (we all do agree that they're extinct now, right ?). At the same time we have a complete lack of fossils from less than 65M years ago. So they went extinct without a trace after living without a trace for millions of years ? How ?

The quote "Non-avian dinosaurs were extinct about 65 million years ago, as the most recent dinosaur bone was directly dated as being 64.8 ± 0.9 Ma old." is a pretty weak inference. Actually, it's just a logically incorrect statement. That bothered me. Now, I already believe that we have enough evidence to reasonably claim that they went extinct 65MY ago and we can treat it as a fact. But the reasoning of the above quote is still wrong.

@elliotsvensson from a purely epistemological stance, there's not enough evidence to conclusively prove any assertion beyond your own existence (See Descarte's evil demon)). However, as a species, we acknowledge no progress could be made if we required absolute certainty for every observation. As such, we've commonly agreed that a high enough level of confidence is adequate to declare something definitively true, like the fact that I've written a comment here. The evidence in this answer surpasses that threshold, so a strict "no" is correct.