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I usually boil water for tea using a(n) ...
I got scared for a moment that I'd forgotten this option, but it turns out it was in the original proposal.
By rote learning.
Via Genetic memory.
It's provided by my firmware.
I just remember them.
Thirty days hath September
My computer gets it right, usually.
I just ask someone else.
Someone punches me on the first of the month.
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