I got that very early on. The dedication to craft cheating devices (even in primary schools) and cram information as densely as possible meant you had to read it a lot, categorize, prune and simplify it to the point you basically knew it backwards.

It failed in high school when I got a graphing calc capable of storing "large" corpus of text. You didn't have to think a lot (mostly careful typing) and it grew too large to even remember everything you typed in.