the intellectual sleight of hand

There is a fantastic dialogue from the movie Idiocracy that best exemplifies this example.  

"For the last time, Im pretty sure whats killing the crops is this Brawndo stuff."

"But Brawndo's got what plants crave.  Its got electrolytes."

*rinse and repeat dialogue for a third of the movie.

Dont be an idiot.  Drink Brawndo.

.........

Wait a minute......

..... Yea, it checks out

Cheers,

:D