Just crashed into a Lamborghini!

Does this mean that the argument that you shouldn't hit supercars is now fatally weakened? :P

Of course, it's basic boolean implication. If one thing is true, then so is the other.

if (you've posted on a porn site) then (when you troll you're shown up to be a plonker and your argument is invalid)

There's a proof of this:
http://en.wikipedia.org/wiki/Material_implication