Think of a hypothesis as a card. A theory is a house made of hypotheses.

Skill is successfully walking a tightrope between the twin towers of New York's World Trade Center. Intelligence is not trying.

Be able to draw an illustration as least well enough to get your point across to another person.

I think one of the problems [with raising intelligent children] is compulsory schooling...and that children are sitting there and they are taught and told what to believe. They are passive from the very beginning, and one must be very, very aggressive intellectually to have a high IQ [...] the child is taught. Right from the beginning, it's a passive process. He or she sits there, and they simply try to believe everything they're told.

Society needs people who can manage projects in addition to handling individual tasks.

Know the difference between principles based on right or wrong vs. principles based on personal gain, and consider the basis of your own principles.

Be able to defend your arguments in a rational way. Otherwise, all you have is an opinion.