Board Thread:Naruto Discussions/@comment-26403664-20160228225013/@comment-734582-20160315130939

Tasuxeda wrote: My point was that an absence of evidence is not evidence of absence. If you had paper to cut, you would use scissors. If you didn't use scissors, then it's a fair bet you never had a pair of scissors on you. This isn't "absence of evidence ->evidence of absence" but "if he could've used it he would've used it".

In stead of going all out against Kabuto and using a Perfect Susanoo to overpower him, Itachi didn't. Because he couldn't. Because even with Edo Tensei negating his weaknesses he cannot perform Perfect Susanoo.