What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 will write a letter or x_12 is not an electrician. For all x_12, x_12 is a scientist if and only if x_12 will cook. There is at least one x_12 for which if x_12 writes a letter, then x_12 is a scientist.
For all x_12, if x_12 were an electrician, then x_12 is writing a letter. For all x_12, if x_12 were a scientist, then x_12 is cooking. For all x_12, if x_12 cooks, then x_12 is a scientist.