Board Thread:General Discussion/@comment-44061-20130227173419/@comment-44061-20130227180424

Better question why would you assume that he does. Knowing that Isshin is a Shinigami is very different from knowing him on any level. I can find info on Thomas Edison doesn't mean I know him in any way beyond what info I find. In their fight with one another he knew Isshin was his father but made no point in recollection of him beyond that. That is something totally unlike Aizen, as he is a talker that likes to push peoples buttons. More importantly its an assumption unless stated of their being previously acquainted with one another there is no info to determine that. Until such time as we have more info its more likely a logic point to go with they dont know one another, then to assume they do based on Aizen having information he could have got from anywhere. Just the same as how Mayuri or Urahara learns what he learns about others.