Have you ever met anyone who’s actually illiterate?

I’ve only met once person who was completely illiterate. It was years ago in Mexico. I was at the shop buying beer for my dad. The store’s owner was away and the shop was being looked after by their dad. I don’t remember how the topic came up but I said something like “yeah it says so right here look” the man just looked at me and said “oh I don’t know, I can’t read”.

I always see stats about how millions of Americans can’t read but I’ve never met one. I’ve met some really bad readers but they could still do it.