Trad de Aohige pour la rencontre Ace/Smoker :
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Not true.
The Japanese line says "おれとお前の能力じゃ勝負はつかねェよ"
There's no way that can be translated in favor of Ace, he's not saying Smoke can't defeat him.
It's saying neither of them can defeat either.
It should say "You may be smoke, but I'm fire. With our abilities against each other, this fight wouldn't end"
If stephen indeed did translate that line, I think that's one of very rare mistake of his.
I think stephen confused that line with "勝負にならねェよ", which is very similar, but insinuate that Smoker can't defeat him, not both way around.
Again, if Ace could use haki, he wouldn't be saying this solely based on their abilities (unless he just wanted to convice Smoker to retreat, of course).
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Je sais que la plupart des gens sur ce topic en sont convaincus mais... Avec ça, Ace n'a pas le haki 
Et pas de connerie sur Oda n'y avait pas pensé, Oda avait déjà écrit l'arc des HP depuis pas mal de temps à Alabasta 