One of the downfalls of having a nearly eidetic memory is that he forgets that other people can't recall entire conversations verbatim years after the fact.

"I suppose that makes sense." It reminds him of Sol all over again, conveying the memories of others like Dan because they couldn't really process that many people's memories in one go. "You... are on good terms with your brother now?" Because that is... definitely not in line with what he knows from both Ignis and what limited records they could find from the early days.