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 writes a letter, then x_11 is a musician. There is at least one x_11 for which x_11 will write a letter. For all x_11, if x_11 were a cashier, then x_11 is a poet. For all x_11, if x_11 takes a plane, then x_11 is a cashier. For all x_11, x_11 will take a plane.
For all x_11, x_11 is a cashier. There is at least one x_11 for which x_11 is a musician. For all x_11, if x_11 takes a plane, then x_11 is a poet. There is at least one x_11 for which x_11 will write a letter and x_11 will take a plane. There is at least one x_11 for which x_11 will take a plane and x_11 will write a letter.