An overly complex conditional is an overly complex conditional regardless of whether it appears as part of an if statement or an unless statement.

I think I should've formulated the question in other words: "Quick, when will we enter into the block?".

• if ($bar !~ /bar/ and ($baz =~ /qux/ or not defined $undef)): If this doesn't match that, and at least one of the other conditions.
• unless ($bar =~ /bar/ or ($baz !~ /qux/ and defined $undef)): Err, well... applying DeMorgan... err... when there's no match... and...

Or, put it yet another way: if we know the values of $bar, $baz, and $undef, is it easier to walk the if or the unless conditional?

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