A mosquito can "fly", but a fly can not "mosquito".
Depth perception
A bad golfer goes "Damn!" A bad skydiver goes "Damn!"
It has legs, but doesn't walk, beak, but it doesn't bite and wings, but it doesn't fly. What is it? -A dead crow
A Stark contrast
Two. But I don't know how they got in there.
Nothing. You can't cross a vector with a scalar.