If walking around campus, I can recognize students who've been in a 20-person seminar with me for at least a month, but I only recognize students from a 50-person lecture class if they talk a lot.
I go to kickboxing classes with one of my best friends and since he looks a lil different at the gym (no glasses, wearing shorts) I regularly lose track of him and pass over him until I'm within a few feet. If people change their hair then I'm guaranteed to have trouble
friend of a few years/flatmate of a year. Walked to the train together one day. Ended up following a different woman, standing with her in awkward silence, until friend reappeared and I realized she'd needed to top up her transit pass, and the stranger wasn't her
I'm name-blind. I will remember a face from twenty years ago, but you ask me to name that person? Even if I remember everything else about them, they were my closest coworker, and we spent multiple summers together that I remember vividly? Ha-ha-ha, never gonna happen. Hey, you!