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_11 for which x_11 will make tea if and only if x_11 is a carpenter. For all x_11, if x_11 were a police officer, then x_11 is taking a plane. For all x_11, x_11 is a police officer or x_11 will make tea. For all x_11, x_11 is a carpenter or x_11 will not take a plane.
For all x_11, if x_11 takes a plane, then x_11 is a carpenter. There is at least one x_11 for which if x_11 makes tea, then x_11 is a carpenter. There is at least one x_11 for which if x_11 were a carpenter, then x_11 is making tea.