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 makes tea, then x_11 is a scientist. For all x_11, x_11 will make tea or x_11 is a police officer. For all x_11, x_11 is not a scientist or x_11 will listen to a song. There is at least one x_11 for which if x_11 were a police officer, then x_11 is a scientist.
There is at least one x_11 for which x_11 is a scientist.