What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, if x_7 were an artist, then x_7 is not writing a letter. For all x_7, x_7 will drink water if and only if x_7 is an artist. For all x_7, x_7 will write a letter and x_7 is an electrician.
For all x_7, x_7 will write a letter. For all x_7, x_7 is an electrician. For all x_7, if x_7 drinks water, then x_7 is an artist. For all x_7, if x_7 were an artist, then x_7 is drinking water.