What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Elisabeth is climbing a mountain or Patricia is running. Elisabeth is not climbing a mountain or Jessica is playing squash. If it is overcast, then Patricia is running. If Jessica plays squash, then it is overcast. If Patricia goes running, then it is overcast.
If Jessica plays squash, then Patricia is running. Patricia is running or Jessica is playing squash. It is overcast if and only if Patricia is running. Patricia is running if and only if it is overcast.