Have you ever played fetch with a dog and pretended to throw the ball for the dog to chase? The first time you do it, the dog cheerfully bolts off to ‘retrieve’ the ball. Then, after about 20 metres, it stops – confused as to where the ball is. After a bit of sniffing around, it ruefully trots back to you with no idea of what happened and how the ball ended up back in your hands.
Amused by the whole affair, you do it again with the same result. However, after about the third or fourth time, the dog is on to your charade. As you ‘throw’ the ball, it now just sits there looking at you – wondering when you’re going to stop taking it for a fool and just throw the damn thing.