What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: There is at least one x_16 for which x_16 will not drink water. For all x_16, x_16 is bored or x_16 is sad. For all x_16, x_16 is a musician if and only if x_16 will drink water. For all x_16, x_16 is a musician if and only if x_16 is bored.
For all x_16, if x_16 were a musician, then x_16 is drinking water can be inferred via the universal biconditional elimination rule. For all x_16, if x_16 were a musician, then x_16 is bored can be inferred via the universal biconditional elimination rule. For all x_16, if x_16 drinks water, then x_16 is a musician can be inferred via the universal biconditional elimination rule. For all x_16, if x_16 were bored, then x_16 is a musician can be inferred via the universal biconditional elimination rule. There is at least one x_16 for which x_16 is not a musician can be inferred via the existential biconditional elimination rule.