What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: Elisabeth is playing a game. Jennifer is drinking water or it is not overcast. Jennifer is not drinking water.
It is not overcast can be inferred via the disjunctive syllogism rule. Elisabeth is playing a game and Jennifer is not drinking water can be inferred via the conjunction rule. Jennifer is not drinking water and Elisabeth is playing a game can be inferred via the conjunction rule. If it is overcast, then Jennifer is drinking water can be inferred via the rewriting rule.