What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x for which if x were an artist, then x is an electrician. For all x, if x plays squash, then x is an electrician. For all x, x will not play squash. For all x, if x were a politician, then x is an artist. For all x, x is an electrician if and only if x will play squash.
There is at least one x for which if x were a politician, then x is an electrician. For all x, if x were an electrician, then x is playing squash. For all x, if x plays squash, then x is an electrician. For all x, x is not an electrician.