What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is cloudy or Sarah is not playing tennis. If Joseph were an artist, then John is a server. John is a server if and only if it is cloudy. Joseph is not an artist. If John were a server, then Joseph is an artist.
John is not a server. If Sarah plays tennis, then it is cloudy. Joseph is an artist if and only if John is a server. John is a server if and only if Joseph is an artist. If John were a server, then it is cloudy. If it is cloudy, then John is a server.