If Garcia did, Floyd certainly could. And as easy as it is to hit Khan, with his chin... High probability.
Yah, Floyd doesn't have a lot of power and he is conservative with his punching, but he's got more than enough to shatter Khan's chin.
Yes, but it would be Floyd's left hook that did it as Khan came in, like Ricky Hatton walked into and Corrales couldn't do anything about all night (but Corrales, though hit as flush as you can be hit, has a bit more recovery powers than Khan)
I think it depends on whether Floyd wanted too or not, i think Floyd could of sat back and boxed Khan's head off all night en route to a landslide decision or went in for the kill and finished him within 5-6 rounds. Whatever he wanted to do, basically.
Khan os easy to hit for someone with timing like Floyd and we know Khan chin isnt great, Floyd late KO!