What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Charles is not listening to a song. For all x_16, x_16 is an astronaut if and only if x_16 is a politician. Charles is listening to a song or James is an astronaut.
James is an astronaut. If James reads a book, then Charles is listening to a song. For all x_16, if x_16 were an astronaut, then x_16 is a politician. For all x_16, if x_16 were a politician, then x_16 is an astronaut.