What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y, y will not read a book. There is at least one y for which if y plays squash, then y is reading a book. For all y, y is a politician if and only if y will play squash.
There is at least one y for which y will not play squash. For all y, if y were a politician, then y is playing squash. For all y, if y plays squash, then y is a politician.