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_6 for which if x_6 plays squash, then x_6 is a bartender. For all x_6, if x_6 were a soldier, then x_6 is curious. For all x_6, if x_6 were curious, then x_6 is playing squash. For all x_6, x_6 is a soldier.
For all x_6, x_6 is curious can be inferred via the universal modus ponens rule. For all x_6, if x_6 were a soldier, then x_6 is playing squash can be inferred via the universal transitivity rule. There is at least one x_6 for which if x_6 were curious, then x_6 is a bartender can be inferred via the existential transitivity rule.