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 if x_11 were an astronaut, then x_11 is playing squash. For all x_11, if x_11 reads a book, then x_11 is playing squash. For all x_11, if x_11 plays squash, then x_11 is an astronaut. For all x_11, if x_11 were an artist, then x_11 is reading a book.
For all x_11, if x_11 reads a book, then x_11 is an astronaut. For all x_11, if x_11 were an artist, then x_11 is playing squash. There is at least one x_11 for which x_11 is an astronaut if and only if x_11 will play squash. There is at least one x_11 for which x_11 will play squash if and only if x_11 is an astronaut.