http://en.wikipedia.org/wiki/TANSTAAFL  
  
TANSTAAFL = There ain't no such thing as a free lunch.  
  
Robert Heinlein (1966) ... not Milton Friedman!  
  
If you Google on the phrase "no free lunch"  
you will learn about a family of theorems in  
computational complexity theory.  
("No Free Lunch theorems")  
  
Martin C. Tangora