Given the way the modern IQ scale is defined, it makes little sense to say that 100 to 85 is "a loss of 15%". You can only say it's a loss of one standard deviation.How? If it is 60% heritable, and if the mean is 100, is a loss of 15% due to environmental factors really that unlikely?
People want to tell everything instead of telling the best 15 words. They want to learn everything instead of the best 15 words. In this thread, instead post the best 15-words from a book you've read recently (or anything else). It has to stand on its own. It's not a summary, the whole value needs to be contained in those words.
I'll start in the comments below.
(Voted by the Schelling study group as the best exercise of the meeting.)