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: For all x_8, if x_8 drinks water, then x_8 is climbing a mountain. Jessica is drinking water. For all x_8, if x_8 climbs a mountain, then x_8 is drinking water.
There is at least one x for which x will drink water can be inferred via the existential generalization rule. For all x_8, x_8 will drink water if and only if x_8 will climb a mountain can be inferred via the universal biconditional introduction rule. For all x_8, x_8 will climb a mountain if and only if x_8 will drink water can be inferred via the universal biconditional introduction rule.