Childhood stimulation key to brain development, study finds

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5. Quite true.

Although training can help, if done right, where normal mental functions are not all available. But that's still a big problem.

Violating social taboos and conventions will not serve you well, no matter how irrational they are; so I consider that it is a social necessity to be able to tell your higher intelligence to shut up, a matter of survival. I know I learned really early on not to say what I really think unless I know who I am talking to.