<zzo38> slashlearn cricket//Cricket is one team is in and one team is out, and the team who are out try to get the team who is in to be out, and then the team who was previously out can be in. Whoever earn more points wins, unless you run out of time, in which case nobody wins.

The cut-elimination theorem states that any Prolog program written using the cut operator ! can be rewritten without using that operator.