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: Mary is not a musician. It is overcast or Mary is a nurse. If it is cloudy, then it is windy. If it is overcast, then Jessica is drinking water. If it is windy, then Mary is a musician. If Mary were a musician, then it is cloudy. If Mary were a nurse, then Jessica is drinking water.
It is not windy can be inferred via the modus tollens rule. If it is cloudy, then Mary is a musician can be inferred via the transitivity rule. If it is windy, then it is cloudy can be inferred via the transitivity rule. If Mary were a musician, then it is windy can be inferred via the transitivity rule. Jessica is drinking water can be inferred via the disjunction elimination rule.