the.com/estimation

Being roughly right fast beats being exactly right too late.

means A rough calculation or judgment of amount, value, or worth, made without claiming exact precision.

from From Latin aestimare, 'to value, appraise, assess the worth of' — the same root that gives us 'esteem.' An estimate and the esteem you hold someone in are etymological siblings: both are acts of weighing worth, one applied to numbers, the other to people.

fermi's gift
physicists guess within 10x before calculating exactly
rounding power
bar napkin math built the atomic bomb's yield predictions
the trap
false precision feels smarter but hides bigger errors
real skill
knowing which digits actually matter
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