Since this was true when I was in primary school, it’ll always be seared into my brain. I mean, I realized this when I was learning to count and spell, of course it’s saved as one of the most basic facts of life. Like, 4+4=8, 90s are 10 years ago 70s are 30 years ago etc was stuff learned at the same time, so it’s like it’s saved in a similar way.