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 keeps the ignoramuses out of medical school," replied the professor.
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