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A scalar value is interpreted as TRUE in the Boolean sense if i
+t is not
the null string or the number 0 (or its string equivalent, "0")
Boolean context is just a special kind of scalar context where
conversion to a string or a number is ever performed.
Truth and Falsehood
Negation of a true value by "!" or "not" returns a special fals
When evaluated as a string it is treated as '', but as a number
+, it is
treated as 0.
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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