What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If James sleeps, then it is cold. If it is cold, then Elisabeth is playing squash. If Barbara were a bartender, then James is sleeping. Elisabeth is not playing squash.
It is not cold. If James sleeps, then Elisabeth is playing squash. If Barbara were a bartender, then it is cold.