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, if x_6 were a musician, then x_6 is happy. There is at least one x_6 for which if x_6 were a musician, then x_6 is a carpenter. For all x_6, if x_6 were a carpenter, then x_6 is a musician. For all x_6, x_6 is not happy.
For all x_6, x_6 is not a musician. For all x_6, if x_6 were a carpenter, then x_6 is happy. There is at least one x_6 for which x_6 is a musician if and only if x_6 is a carpenter. There is at least one x_6 for which x_6 is a carpenter if and only if x_6 is a musician.