What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_16, x_16 is a carpenter if and only if x_16 is happy. For all x_16, x_16 will work if and only if x_16 is a nurse. There is at least one x_16 for which x_16 is not happy. For all x_16, x_16 is a carpenter if and only if x_16 is a nurse.
For all x_16, if x_16 were a carpenter, then x_16 is happy. For all x_16, if x_16 works, then x_16 is a nurse. For all x_16, if x_16 were a carpenter, then x_16 is a nurse. For all x_16, if x_16 were happy, then x_16 is a carpenter. For all x_16, if x_16 were a nurse, then x_16 is working. For all x_16, if x_16 were a nurse, then x_16 is a carpenter. There is at least one x_16 for which x_16 is not a carpenter.