Fat Free Fries




I stopped at a fast food restaurant, intrigued by a sign which offered fat free
fries.  I decided to give them a try, but I was dismayed when the clerk pulled
a batch of fries from the fryer dripping with fat, and then put a bag of these
fries in with my order. 

"Just a minute," I said, "those aren't fat free." 

"Yes, they are," he replied, "we only charge for the potatoes, the fat is free."