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, if x_11 were a server, then x_11 is taking a plane. For all x_11, if x_11 were a mechanic, then x_11 is not taking a plane. There is at least one x_11 for which x_11 is a server. For all x_11, if x_11 were fast, then x_11 is a mechanic.
There is at least one x_11 for which x_11 will take a plane.