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: If Karen climbs a mountain, then Robert is a lawyer. For all x_7, x_7 is a lawyer if and only if x_7 will go running. Karen is climbing a mountain or Robert is running.
If Robert drinks water, then Karen is climbing a mountain can be inferred via the rewriting rule. For all x_7, if x_7 were a lawyer, then x_7 is running can be inferred via the universal biconditional elimination rule. For all x_7, if x_7 goes running, then x_7 is a lawyer can be inferred via the universal biconditional elimination rule.