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, x_7 is not an electrician or x_7 is curious. Jessica is not curious or Charles is playing tennis. For all x_7, x_7 is not happy or x_7 is an artist. For all x_7, x_7 is an electrician or x_7 is happy.
For all x_7, x_7 is happy or x_7 is curious.