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_12, x_12 is a poet. For all x_12, x_12 is an office clerk. It is overcast.
For all x_12, x_12 is a poet and x_12 is an office clerk can be inferred via the universal conjunction rule. For all x_12, x_12 is an office clerk and x_12 is a poet can be inferred via the universal conjunction rule.