"I don't have one in my world even though I have - am married to, actually - a Sherlock," says Glass, "so this is hearsay and a smidgen of looking-at-templates, but it has sounded to me like they organize things - especially people - in their lives as more or less important in a way that's legible to us as opposed to sort of... haphazardly not doing that, the way that, say, Jokers do."