Didn't I? Don't decide on the veracity of something before reading the whole of it. The postscript is just as much a part of my statement as the rest of it, and it's much clearer than injecting numerous "maybe"s any "perhaps"es into the text itself.
Yes, it was presented as a fact. Prefixing it with, "this sounds cool but I have no idea if it is true," would have made it honest but reduce its directness.
Also, "postscript", something which comes after the main statement. That it changes the basis of the statement itself, could be called a linguistic hack.