Mafwek: True in the sense that even persons of low intelligence are intelligent. When I speak of intelligence, I mean high intelligence.
It was quite well explained in an Isekai book i was reading, that stats don't affect your actual intelligence but instead affect how well your skills are effective in the sense of success or level of success...
But that's when you break the 4th wall. When you don't, you expect an 18 intelligence person to be... intelligent... and actually know things.