No answer is adequate unless as a minimum includes the concepts related to Bernoulli's Law, Newton's Laws, and circulation. These are the fundamentals beyond which the subject cannot be reduced. Most people are ok with some Bernoulli and some Newton, heck we get that in grade school. But circulation requires calculus to truly get because you have to integrate the flow field around a circle to arrive at the sum. That is what sorts the men from the boys, although in truth the explanation is not that hard once you see a 2D thin airfoil derivation. Second year college physics. Like I said above in the article, you can go so far as to set up a test chamber with a wing in it, but you will come up short of predicting how much lift and drag it makes until you introduce the complementary concept of circulation. Bernoulli and Newton's Laws are not the whole deal. If they were, we might have had airplanes in the 1700s. Saying an elephant has a trunk, and that's all, does not negate the fact it also has legs and a body. It is a partial explanation, and a partial one only. You simply must include all three fundamental concepts to get the whole solution.