"Thank you for your informed response"

Hmmm, my sarcasm meter seems to be on the blink - the needle's going crazy ...

I am not particularly 'informed' on the matter - just enough to know that there is no end of theories about the origins of what are generally considered to be the indigenous peoples of the Americas. There are those sea-faring Phoenicians, those early Europeans crossing an ice-bridge, the lost Chinese fleet, etc., etc.. And the Polynesians. Probably the Atlanteans, too. And then there are those extraterrestrial lads with the imaginative landing strips ...