King Daniel Into Darkness wrote:
No definites about it. For Chekov to be a different person, you have to prove he was telling the truth about his age in "Plato's Stepchildren", or that there were no time dilation or other temporal shenanigans involving him prior to his time on the Enterprise.
Lol! If we couldn't even trust canon to be canon there would be anarchy! Oh, wait...
However, it is a valid point even if it doesn't explain why Scotty's personality is very different. Maybe he's a changeling?