Honestly, he wouldn't know it was pre-edited or not because the time stamp would not appear until more than 60 minutes have elapsed. So if I'd changed anything less than an hour of me posting it would show as no change at all.
I made my post (377) at 9:23 and he quoted me at 9:33. So he saw what I wrote (and it's in his quote of my post) and his poor Se skimmed over it.
If I edited his post, there would automatically be a record of it and it's clearly not there.
So what else am I to believe that he was trying to insinuate that I'd play some trickery and edit in something to cover my tracks?