Post is still not a lie, as your statement followed the post. You can't say that someone in the year 1900 was a liar if they said "no man has walked on the moon".
Technically you wrote it, not said it. Therefore your comment is a LIE
Okay now you have to follow through. Go out and marry one of those falsie-long-lashes freaks. No divorces allowed. You must gaze adoringly into her eyes at least twenty times a day for the rest of your life.