It makes interesting reading to encounter the latest trumpet playing theory. The immediate negative? It is not proven. Then again, how can it be proven and remain theory since theory is nothing more than unproven assumption. Conjecture, if you will. Conversely, not all theory produces sound results. Proof? The percentage of successful trumpet players is no greater today than it was during the reign of Harry James. Possibly the answer lies in syllogism: major premise, minor premise and logical conclusion. If so, then theory and trumpet playing share a common element: not all are created equal.