Board Thread:Naruto Discussions/@comment-26403664-20160228225013/@comment-681696-20160315135526

Thekillman wrote:

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 cannotors perform Perfect Susanoo. The ones that could use PS had either EMS or Six Paths chakra.

Or using a paper trimmer to get better results than scissors.

Itachi was in a cave that PS couldn't fit in and wanted to capture not kill Kabuto.

It is an assumtion that use PS requires either EMS or Six Paths chakra it is a fact.