if (($a == 3) || ($a ==  77) || ($a == 8))
-- is equivalent to --
if (($a != 3) && ($a !=  77) && ($a != 8))

[download]

No, those two aren't equivalent, they're exact opposites. It seems you didn't apply what you said:

when changing the nested logic in a condition such as that you must necessarily change the higher level logic if you wish for the original to be equivalent to the negated version.
if (($a == 3) || ($a ==  77) || ($a == 8))
-- is equivalent to --
if (!( ($a != 3) && ($a !=  77) && ($a != 8) ))

[download]

In reply to Re^3: Multiple numeric not or compare in if statement by haukex
in thread Multiple numeric not or compare in if statement by RedJeep

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