This question already has an answer here:
Let $P$ = "Pigs can fly" and $Q$ = "I'm king".
Apparently, there's a rule stating that $P \implies Q$ is true, if $P$ is false.
In this example, $P$ is indeed false, because pigs cannot fly. But how does this make the implication true?
The way I see it, pigs learning to fly will not cause me to be crowned king.
What am I missing here?
Any help appreciated?