What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_13, x_13 will cook. For all x_13, if x_13 were an astronaut, then x_13 is a mechanic. There is at least one x_13 for which if x_13 were a mechanic, then x_13 is taking a plane. For all x_13, if x_13 plays squash, then x_13 is a mechanic. For all x_13, x_13 is an astronaut or x_13 will play squash.
There is at least one x_13 for which if x_13 were an astronaut, then x_13 is taking a plane. There is at least one x_13 for which if x_13 plays squash, then x_13 is taking a plane. For all x_13, x_13 is a mechanic.