When it comes to growth rates, do not trust…

When it comes to growth rates, do not trust your intuitior You don't have any. Accept it. What really helps is a calculator or, with low growth rates, the magic number of 70.

— from The Mind in the Cockpit · Art of Thinking Clearly by Rolf Dobelli

In the book

The truth is that intuition is only as good as the experience feeding it: the expert's hunch is trustworthy because he has learned, over thousands of repetitions, exactly what to look for, while the novice's hunch is just a guess in a nice suit. This is also why you should flatly distrust your intuition about anything exponential or statistical: on growth rates the gut has nothing useful to say, and the honest move is to admit it and do the arithmetic. And here is a counterintuitive gift: more information and more memory are not always better. — The Mind in the Cockpit

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