What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is snowing or Barbara is not a musician. It is snowing if and only if Michael is a taxi driver. Michael is a taxi driver if and only if Barbara is a musician.
If Barbara were a musician, then it is snowing. If it snows, then Michael is a taxi driver. If Michael were a taxi driver, then Barbara is a musician. If Michael were a taxi driver, then it is snowing. If Barbara were a musician, then Michael is a taxi driver.