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Traffic lights do not condition humans. Traffic accidents, driving instructors, parents and policemen do.

I find myself sharing the grandparent's discomfort. I'm an avid gamer, yet sometimes, when I lie awake at night and mull over the events of the day, I find myself wondering if I've truly mastered the game or if the game has only taught me what succession of button presses and mouse movements give me the highest levels of dopamine.

If that is so worrying to you ... maybe it is time to put down the controller and pick up a tennis racket, or golf clubs and go outside. Either you are getting better and can master the game and win tournaments, or you can't.

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