Ben, you continue to misunderstand my comments. The “what” is downwash, the “how” is pressure. I studied the same texts, and through my years in industry probably did a lot of the same stuff as you. Everything you have said about pressures is true. I am the first to agree that when designing wings ‘n things study of pressures is paramount. I am only puzzled at your reluctance to acknowledge “the rest of the story”.