User blog comment:Savalric/Inconsistencies with the story/@comment-26420452-20131115095850/@comment-10579249-20131116023327

But he didn't lie to him about how he discovered him. He told him that he found out how they were entering due to his connection with Urahara and knowing how his gate worked. He never mentioned how he knew about Ichigo until the Fake Karakura arc. While it's possible that he lied, remember that a lot of people seems to know Urahara, and that he was exiled. You think that no one would check him on his info? It's a big leap to assume that something like that would remain a lie for so long, rather than it being a small inconsistency. Aizen was caught and was dropping hints about his plans, his past actions, his motives, I doubt he'd feel the need to lie at that point.