I didn't realize, until I came to WP, that face blindness was a thing and then over the past couple years, realizing that I have it. If I don't see someone in context, I have no idea who they are. I cannot picture a face (or anything else for that matter) in my brain no matter how well I know someone. Even my husband who have looked at for more than a decade.
For example, the other day I was sitting in a room waiting for a meeting to start. The mother of the client entered the room. The only reason I could identify her is because I knew she was coming. If I saw her someplace else, I'd have no idea who she was until it was more or less revealed to me by conversation.
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The river is the melody
And sky is the refrain - Gordon Lightfoot