What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_11, x_11 will play tennis or x_11 will take a plane. There is at least one x_11 for which if x_11 were a sailor, then x_11 is a scientist. For all x_11, if x_11 plays tennis, then x_11 is a sailor. For all x_11, if x_11 takes a plane, then x_11 is a scientist.
There is at least one x_11 for which if x_11 plays tennis, then x_11 is a scientist.