We ought to be able to persuade on opposite sides of a question; as also we ought in the case of arguing by syllogism: not that we should practice both, for it is not right to persuade to what is bad; but in order that the bearing of the case may not escape us, and that when another makes an unfair use of these reasonings, we may be able to solve them.
Don't use a different dish for every single ingredient. If you've got three ingredients that go in at the same time, put them all in the same plate. That way you have just one plate to dump in.