That's a great question if you're asking it in earnest. But if it is a rhetorical trick then it's dumb. We don't know a LOT of stuff about the world, but that does not mean we know nothing and it damn sure does not lend evidence to any alternate ideas such as Creationism.<quoted text>
And which ancestor is this that we split from?
Steve says he saw an animal in the woods. Dave says it was Bigfoot. Steve says no, it was not Bigfoot. Just some animal. Dave asks Steve "Do you know what animal it was?" and Steve answers honestly, "Not really. Didn't get a good look at it."
Dave says "Then it was Bigfoot."
And there you have Creationism in a nutshell.
But about human origins:
"Humans are primates. Physical and genetic similarities show that the modern human species, Homo sapiens, has a very close relationship to another group of primate species, the apes. Humans and the great apes (large apes) of Africa -- chimpanzees (including bonobos, or so-called “pygmy chimpanzees”) and gorillas -- share a common ancestor that lived between 8 and 6 million years ago. Humans first evolved in Africa, and much of human evolution occurred on that continent. The fossils of early humans who lived between 6 and 2 million years ago come entirely from Africa."