> (and 1 0) 0 > (and 0 1) 1 > (and 1 0 0) 0 > (and 0 0 1) 1 > (and 0 1 0) 0 > (and 0 1 1) 1 Seems like and is just returning the value of the last argument. The integers 0 and 1 are supposed (for my purposes ) to be boolean flags true and false so this is not the behaviour that I want. Using language Pretty Big.