At the end of his course on mathematical methods in optimization, the professor sternly looked at his students and said: "There is one final piece of advice I'm going to give you now: Whatever you have learned in my course – never ever try to apply it to your personal lives!"
"Why?" the students asked.
"Well, some years ago, I observed my wife preparing breakfast, and I noticed that she wasted a lot of time walking back and forth in the kitchen. So, I went to work, optimized the whole procedure, and told my wife about it."
"And what happened?"
"Well, before I applied my expert knowledge, my wife needed about half an hour to prepare breakfast for the two of us. Now, it takes me less than fifteen minutes ..."
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