What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If it snows, then Thomas is a scientist. If Thomas were a scientist, then Sarah is a politician. It is not windy. It is windy if and only if it is snowing. If Sarah were a politician, then it is snowing.
If it snows, then Sarah is a politician. If Thomas were a scientist, then it is snowing. If Sarah were a politician, then Thomas is a scientist. If it is windy, then it is snowing. If it snows, then it is windy. It is not snowing.