If someone is trying to
proove a point , but really has no idea what they are arguing , they might use this phrase "
Do one legged ducks swim in circles?", it will throw the opposition for a while until the realise that no they dont , that would be stupid , thus is only good for short term
evasion.
subject change is recommended before they realise :)
Fred:"so you actually understand
quantum physics??"
Sam:"Does a duck with one leg
swim in circles??"
Fred:"umm ??"
Sam:"look at the weather!!"
..
..
much later ...
Fred :" hey
wait a minute , no !!"