If you have a toe and I have a toe then we must have come from some other one thing with a toe. It is not possible that we both came from Some Other Thing With a Toe because, well, that would require Capital Letters and ockham's razor requires us to write in all small letters if we can at all get by with it.
Is Ockham's razor why we can shave, and other mammals can't?
Although I believe that the existence of Rainbow Monkey butts proves that we don't actually have to shave to be smooth skinned.
Hmmm, I seem to have caught myself in a penumbral conundrum.
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You don't understand. We know we evolved the ability to run because, well, we can run. We have structures which allow us to run because we run. We know we de-evolved the tree-climbing structures because, well, we don't have them. And other creatures have them. So it must be true that we used to have them, becasue other creatures have them.
If you have a toe and I have a toe then we must have come from some other one thing with a toe. It is not possible that we both came from Some Other Thing With a Toe because, well, that would require Capital Letters and ockham's razor requires us to write in all small letters if we can at all get by with it.
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To quote the Dead Pirate Roberts: Truly you have a dizzing intellect.