Back-of-the-Envelope Calculation

It was from Kuiper that I first got a feeling for what is called a back-of-the-envelope calculation: a possible explanation to a problem occurs to you, you pull out an old envelope, appeal to your knowledge of fundamental physics, scribble a few approximate equations on the envelope, substitute in likely numerical values, and see if your answer comes anywhere near explaining your problem. If not, you look for a different explanation. It cut through nonsense like a knife through butter.

Notes:

A quick nonsense detection technique.

Folksonomies: empiricism rationalism

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Scientific method (0.764500): dbpedia | freebase
Back-of-the-envelope calculation (0.763526): dbpedia | freebase
Understanding (0.723572): dbpedia | freebase | opencyc
Theory (0.719411): dbpedia | freebase
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 The Demon-Haunted World: Science as a Candle in the Dark
Books, Brochures, and Chapters>Book:  Sagan , Carl and Druyan , Ann (1997-02-25), The Demon-Haunted World: Science as a Candle in the Dark, Ballantine Books, Retrieved on 2011-05-04
Folksonomies: science empiricism rationalism