I can't believe how mean your post is. Are you like this with everyone that you don't agree with or just with anonymous people on the Internet? How would you feel if someone you loved was spoken to like that? It's no secret I'm new to the world of trading, that does not mean I'm stupid, it just means I have got a lot to learn.
Sorry you took offense. Your statement was contradictory within itself. Tell me you're a relative of Yogi Berra, and that will explain everything. I apologize for my harsh words. I should have asked if you noticed the contradiction.
You might want to look at his post again. It was a question (not a statement) and it was meant to probe the contradiction you point out. He simply asked this: "IF ta is useless for predicting future price moves, [THEN] why do so many advocate it?" Don't sweat it. Up the Irons!
His last sentence was sarcasm. Or perhaps more appropriately, scorn. Surf always tries to have it both ways, so long as he comes out ahead. Not logical, not mature and not persuasive, but that's our surf.
It was me and I define it as I defined it in that thread you referenced: Technical Analysis is about deriving prediction and current state of price levels purely from past prices and possibly volume as well or a combination thereof. This contrasts with any other kind of "Quantitative Analysis" does not put such constraint on its definition and may also derive inputs from fundamental factors or economic statistical releases or news.
I use past price action to predict where someone can get hurt the most & react if that happens. Note that nothing works 100%