in reply to
A question about PERL versioning.
The help for say says this :-
This keyword is available only when the "say" feature is enabled,
or when prefixed with "CORE::"; see feature. Alternately, include
a "use v5.10" or later to the current scope.
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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