Instruct: Classify Amazon reviews into positive or negative sentiment
Query: ug Author Is Not Correct

After listening to the author speak on Science Friday, it appears that he thinks lift is the product on air being viscously "pulled" (accelerated) down across the top of the wing. That is totally impossible because air does not support tension (just as yarn does not support compression, or "push") Air fills the space above the wing surface because air pressure existing far above the wing maintains, to the extent possible, the static air pressure exerted on the top surface of the wing. Air mass/inertia prevents instantaneous space-filling above and behind the moving wing. If air had no inertia, wings would produce no lift. The True Simple Explanation of Flight: Wings experience a differential between the upper and lower surface pressures due to air inertia (air can't immediately get out of the way of the wing's bottom surface, and the air can't immediately fill the space above the wing, as the wing passes through the stationary air). Todesvogel