I blame my Dad (a huge wind-up merchant/prankster) for this one because, as a child about 6-7-ish, he told me that the moon was lit up at night from all the street lights on Earth reflecting off it, and I never really thought about that as an idea that I needed to question ever since as the brightness of the moon rarely comes up in conversation.
Then, when I was 40-ish (yes, that old), there was a full moon during a night-shift with about 10 other people all within earshot (in Saudi where there's very little light pollution), when someone said "the Moons bright tonight" and I said out loud "Hmmm, must be more street lights on than normal" and suddenly realised as I was saying it out-loud that it sounded as idiotic as it was and I instantly realised how dumb I was as everyone else fell about laughing at me.
Sadly, if I hadn't said it out loud in front of people, I really do think that I'd very probably have still thought it was true, my poor lost innocence
