My point was that there's (movie) proof of a requip-using enemy disabling Erz's equip into her basic clothing, thus there's no reason why August can't do the same given that the person I was quoting told me himself that movies are canon. August didn't nullify Cobra's hearing but he was shown copying it, so he can copy requip and do what the movie villain did to Erza.I think she/he has a point. August couldn't nullify Cobra's hearing or Racer speed magic. Cobra could hear August's thought fine. Maybe reason he was able to completely nullify Gildarts magic that was casted on him was maybe because crush come with reassembly. Gildarts can disassemble and assemble like he did to tenrou natsu. Don't know if I am wording it right. Maybe August can't do anything beyond the scope of the magic that is used on him. His nullification maybe similar how Natsu nullified August own heat based attack to save others. The way I see if August face some one much more than himself who is using fire, I see him getting burned.
--- Double Post Merged, , Original Post Date: ---
Regarding August's usual nullification, it comes from using the same magic that's being using against him so masterfully that he negates the effect, that's indeed how he negated Crush, it's not an instant-nullifying absolute defense, but a flex of just how instantly he can master the specific magic on sight and undo the attack before it actually reaches and hurts him.