Trick question. (You are a clever one, st0psign...)

Do we ever really KNOW who swim is? Maybe it really IS swim. Or maybe it isn't. But who'd believe it wasn't swim? (Wait. Isn't that a double negative? Haha.)

How do I know swim?

By having to read up information for a situation involving swim. (No wink and nod there. It actually WAS swim.)

Now those who don't know are probably thoroughly confused! Lol.

(Just couldn't resist playing, seeing how you worded it. )