The Purpose of Physics

	As a premed student at Washington University in St. Louis, I had to take a
	difficult class in physics. One day our professor was discussing a
	particularly complicated concept. A student rudely interrupted to ask "Why
	do we have to learn this stuff?"

	"To save lives." the professor responded quickly and continued the lecture.

	A few minutes later, the same student spoke up again. "So how does physics
	save lives?" he persisted.

	"It usually keeps the idiots like you out of medical school," replied the

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