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_5 for which x_5 is a sailor. For all x_5, if x_5 makes tea, then x_5 is listening to a song. For all x_5, if x_5 were a sailor, then x_5 is making tea. For all x_5, if x_5 listens to a song, then x_5 is drinking water.
There is at least one x_5 for which x_5 will make tea can be inferred via the existential modus ponens rule. For all x_5, if x_5 makes tea, then x_5 is drinking water can be inferred via the universal transitivity rule. For all x_5, if x_5 were a sailor, then x_5 is listening to a song can be inferred via the universal transitivity rule.