They are correct though. There is no evidence that chimps walked out of Africa. For two reasons:
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They can't walk for that length of time because we're the ones who walk everywhere, they hang out in trees.
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No one ever said they did.
I'm wondering if this person has ever even seen a chimp, to be honest.
Bell didn't actually invent it (Elisha Gray did), but that aside, They didn't work in a vacuum either. The telephone wouldn't exist without all the discoveries before it. Including the abstract ideas that were necessary for basic electrical devices to be constructed. And Darwin wouldn't have come up with his theory if it wasn't for his grandfather Erasmus and Jean-Baptist Lamarck.
They're just wrong about how science works period.