I agree the combination is the final answer but there is never a case where 10/10 is reasonable; well, unless you're dealing with a typeface with an unusual M-square like some decorative faces have.
Update: and with a face like that 10/10 would be illegibly tiny anyway so more like 24/24.
In reply to Re^6: To <=80 char code line length or not
by Your Mother
in thread To <=80 char code line length or not
by stevieb
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