"<a href=""https://www.youtube.com/watch?v=hppbxV9C63g&amp;t=1h41m55s"">1:41:55</a> "...there is a tremendous amount of validity data that looked at intelligence test scores and various measures of life success...": This reminds me of economists. They take of INFLATION", GDP, Unemployment Rate, and myriad other "un-measurable" quantities. But there's not a single one who can give a "correct" definition of money...how it's created, why it's created, and how it's destroyed. Not a single one. <br><br>IQ's are not measurable. INFLATION is not measurable. Yet these morons pontificate on those things and every other un-measurable thing that they claim to be related and controllable...e.g. teaching and monetary policy. Each one is more stupid than the last...and louder. <br><br>Hint to economists: INFLATION cannot be measured but it can be controlled precisely to be perpetually zero. The operative relation is: INFLATION = DEFAULT - INTEREST = zero with a proper "real money" process.<br><br>Hint to psychologists: Just leave people alone. They'll get along better as a result. And you have no clue what you're doing.