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$_ = 'He lives in Liberia';
print 'with dot: ', $_ if /a./;
# No output
print 'without dot: ', $_ if /a/;
# Outputs 'without dot: He lives in Liberia'
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.
Results (218 votes),