Consider the following premises. For all x_12, x_12 will take a plane. There is at least one x_12 for which if x_12 takes a plane, then x_12 is making tea. For all x_12, x_12 is a poet and x_12 is happy. Can we infer the following from them? If we can, name the inference rule being used: Some poets will make tea.
 From the fact that for all x_12, x_12 is a poet and x_12 is happy we can infer that for all x_12, x_12 is a poet via universal simplification. From the fact that there is at least one x_12 for which if x_12 takes a plane, then x_12 is making tea, and that for all x_12, x_12 will take a plane we can infer that there is at least one x_12 for which x_12 will make tea via existential modus ponens. Finally, from the fact that for all x_12, x_12 is a poet, and that there is at least one x_12 for which x_12 will make tea we can infer that some poets will make tea via existential conjunction. Therefore, the answer is yes.