What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, if x were a sailor, then x is writing a letter. For all x, if x goes running, then x is a sailor. There is at least one x for which if x writes a letter, then x is running.
For all x, if x goes running, then x is writing a letter. There is at least one x for which if x writes a letter, then x is a sailor. There is at least one x for which if x were a sailor, then x is running.