The great enemy of knowledge is not error, but inertness. All that we want is discussion; and then we are sure to do well, no matter what our blunders may be. One error conflicts with another, each destroys its opponent, and truth is evolved.
What is a head rush? When you stand up too fast and get dizzy, it is because the gravity caused some of your blood to collect in your legs, depriving your brain of oxygen.
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