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_8 for which x_8 will make tea. For all x_8, x_8 is an astronaut or x_8 is not a soldier. For all x_8, x_8 is a soldier.
There is at least one x_8 for which x_8 will make tea and x_8 is a soldier can be inferred via the existential conjunction rule. Some soldiers will make tea can be inferred via the existential conjunction rule. For all x_8, if x_8 were a soldier, then x_8 is an astronaut can be inferred via the universal rewriting rule.