He also had a dog called Einstein and said the name quite a few times, which could subliminally add to the confusion when typing about something loosely related.

What’s weird is that I saw the picture and recognised Doc Brown as Doc Brown, but then when I read that response I didn’t notice the wrong name and instead started remembering the picture as Einstein in the same pose and context. Only when I read your response did I realise I’d been tricked. It’s a reminder how easily a person’s mind can be tricked sometimes.