Comment Intelligence is learned (Score 2) 866
While basic understanding and comprehension can be quite varied, our knowledge which determines our intelligence is based entirely on learning 'things'. The average person who thinks they "forget everything" about an introductory class is kidding themselves. I only took an introduction to Chemistry and I couldn't tell you off the top of my head half of the conversions I learned, but that doesn't make the information any less available. I remember information about relating different types of matter, universal constants in reactions. Definitions of basic words like exothermic, endothermic, etc. and most importantly I learned. Sure the material may not have been my particular forte, but making yourself work at something shows what you can accomplish and allows you to think differently whether you realise it or not. If more Language (by this I mean native language spoken) classes were enforced as well perhaps we wouldn't live in such an illiterate, made-up acronym world.