Nefermandias
Hero
First, a fighter gets it's second extra attack at lvl 11.At a specific level with a specific build under specific assumptions? You can "prove" just about anything. What @Mistwell was asking for was your math.
Besides, a fighter doesn't get 3 attacks until 13th level when most PCs never get that high according to the analysis we've been given.
Second, I specifically talked about a fighter with access to feats in the post he quoted, so I don't see where you are getting at?
Third, I'm not talking about some obscure over specialized build, I just gave three very, very common options for any fighter in a game with feats.