Relevant links:- Mental abilities = 1. Quantity * 2. Quality- Link to what the most popular IQ test consists of. https://en.wikipedia.org/wiki/Wechsler_Adult_Intelligence_Scale- Intelligence continuum: inherited (born) <=> built- Lex Fridman Podcast: Richard Haier: IQ Tests, Human Intelligence, and Group Differences | #302 | https://www.youtube.com/watch?v=hppbxV9C63g- Sam Harris Podcast: Forbidden Knowledge: A Conversation with Charles Murray. https://www.samharris.org/podcasts/making-sense-episodes/73-forbidden-knowledge- There are material quantity differences in the time students spend upgradings.If you want to contact us please do so at [email protected]