Board Thread:Questions and Answers/@comment-7708862-20130402005255/@comment-7708862-20130403164831

@insistente and sunxia Aizen wasn't fighting against ichigo yet. At that episode where yammi released. Ulquiorra was just killed, ichigo was still in wake mundo. So the rule still existed. And omfg it not about if it is rule or not, it is about that his release should make it go 'boom'.

So it isn't about the rule nor that that yammi didnt follow it. It is about that the inner world didn't collapse or got destroyed.