What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, x_6 is not happy or x_6 is curious. For all x_6, if x_6 were a scientist, then x_6 is a musician. There is at least one x_6 for which x_6 is a cashier. For all x_6, if x_6 were curious, then x_6 is a musician. For all x_6, x_6 is happy or x_6 is a scientist.
For all x_6, x_6 is a scientist or x_6 is curious.