THEM: hi. i'd like four hats and the book, leaving you with two balls. what do you say?  YOU: that could not be fare...  THEM: what are you offering?  YOU: i need one book and the hats  THEM: i definitely can't give up the hats. how about you take the book and the balls, and i get the hats.  YOU: that sounds good  THEM: ok great. i get all the hats, you get the book and both balls. deal?  YOU: no no, wait  THEM: what?  YOU: that's very raw deal  THEM: ok, well then we're not going to make a deal, because i am not giving up any hats.  YOU: no deal then.