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.
Orangutan "getting on boats" to leave Borneo is a hilarious image. Like Douglas Adams without the literacy.
This individual would make a good scientist. They are curious, require evidence to challenge claims, will investigate the evidence, and struggles to make sense of it. If they were taught how to perform their investigation, what being thorough means, and how to test their wild guesses.
This poor person could have made breakthroughs in anthropology or archeology in another life.
They may believe that the "orangutang" is a smarter primate than them because they don't even know how to spell its name.
All things which I don't know how to spell are smarter than humans.
Proboscis monkeys are divine beings.