When you "think" you saw a celebrity or someone you knew but aren't really sure...usually it is because you really
saw them. Otherwise, you would definately
know it was not them.
Usually when I am not sure, but feel strongly about it, then it is true.
I don't know...unless you recently have been thinking a lot about hoping to chance meet him.
But, I am sure if you were going about your day and weren't thinking about him at all, it could definately be him. Too bad you didn't get a closer look.
I wonder what he was doing in Scotland...