Yeah - there's two goals in the game - 1 is to post clues you think your fellow players can get that I can't, to get more letters; and 2 is to actually guess my word
In the interest of fair play, I honestly am way past the point where bijection, surjection, injection, inversion, or any of that ilk have any meaning to me anymore
@boboquack Only if you take that set to be part of the definition of the function. All you really need for a function is a domain and a definition of the map.