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_2 for which x_2 will write a letter or x_2 will take a plane. For all x_2, x_2 will not take a plane. For all x_2, x_2 will not write a letter or x_2 will play squash.
There is at least one x_2 for which x_2 will take a plane or x_2 will play squash.