Exploration versus Exploitation / Erkunden versus Ausschöpfen:

http://meinnaturwissenschaftsblog.blogspot.com/2018/09/erkunden-oder-ausschopfen.html

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"our intuitions about rationality are too often informed by exploitation rather than exploration. When we talk about decision making, we usually focus on the immediate payoff of a single decision - and if you treat every decision as if it were your last, then indeed only exploitation makes sense. But over a lifetime, you're going to make a lot of decisions. And it's actually rational to emphasize exploration - the new rather than the best, the exciting rather than the safe, the random rather than the considered - for many of those choices, particular earlier in life."

Brian Christian & Tom Griffiths