'********** set operations 'PlanetX is Mars, Pluto, or Venus. {Mars,Pluto,Venus}>. %0.90% 'PlanetX is probably Pluto or Saturn. {Pluto,Saturn}>. %0.70% 32 'PlanetX is Mars, Pluto, Saturn, or Venus. ''outputMustContain(' {Mars,Pluto,Saturn,Venus}>. %0.97;0.81%') 'PlanetX is probably Pluto. ''outputMustContain(' {Pluto}>. %0.63;0.81%')