What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x, if x were a scientist, then x is cooking. For all x, x will play tennis or x will cook. For all x, if x cooks, then x is a scientist. For all x, if x plays tennis, then x is a scientist.
For all x, if x plays tennis, then x is cooking. For all x, x is a scientist. For all x, x is a scientist if and only if x will cook. For all x, x will cook if and only if x is a scientist.