in reply to Converting 24 hour time back into 12 hour
($hour %= 12) ||= 12;
The problem with your solution is that, now 12:00 (lunch time) becomes 0:00 ;-) If you read other answers carefully, you will fnd that they made effort to avoid this.
There is no Extraterrestrial life
There aren't any suitably capable Extraterrestrials
Interstellar travel is too difficult
We're too uncool / not worth the trouble
What do you mean they haven't visited?
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