Ditto; I had a couple friends that were identical friends, and it only took a few days of interaction I think to start consistently differentiating them -- and

Ditto; I had a couple friends that were identical friends, and it only took a few days of interaction I think to start consistently differentiating them -- and I have terrible memory of people. They're identical for the most part, but there's always obvious cues; how they walk, different expressions/reactions, different tones when talking, slightly different slang, etc. It's like a deterministic lockstep game that desynchronized when they were born -- the desync slowly but surely cascades.