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_11, if x_11 makes tea, then x_11 is a soldier. For all x_11, x_11 will make tea or x_11 will not write a letter. For all x_11, x_11 will write a letter or x_11 is not a soldier.
For all x_11, if x_11 writes a letter, then x_11 is making tea can be inferred via the universal rewriting rule. For all x_11, if x_11 were a soldier, then x_11 is writing a letter can be inferred via the universal rewriting rule.