All that would be relevant if I were positing that key > keystone, but it's obviously the opposite so I'm not sure why you're trying to convince me that a keystone is important.

I'm not looking for a crack here and the "nitpicking" was a convenient example of how both sides are skewing reality to suit their ends.

Anyway, I notice that the title has now been changed to reflect the original headline so I guess somebody else thought they were different enough words to warrant changing it back again.