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_5, if x_5 plays tennis, then x_5 is an artist. For all x_5, if x_5 were a writer, then x_5 is an artist. For all x_5, x_5 will drink water. For all x_5, if x_5 writes a letter, then x_5 is a writer. For all x_5, x_5 will write a letter or x_5 will play tennis.
For all x_5, if x_5 writes a letter, then x_5 is an artist can be inferred via the universal transitivity rule.