So let’s talk about prosopagnosia, or “faceblindness.” I have it! What this means is that I could well have known you for twenty years, but if I see you outside of the context in which I usually encounter you, or even if you change your hairstyle (!), I may simply not recognize you the next time we cross paths. It’s mortifying! I have literally introduced myself to people I’ve worked alongside for years – who are, entirely understandably, generally fairly miffed that I’ve treated them so poorly.