I'll take just a brief second to debunk the top two false claims made by Sodomite Dave.
1) gravity is just a theory. It's admittedly a theory, and no one knows what it is or what causes it. Explanations from top physicists range from electromagnetic forces, curving of space time, the simple laws of thermodynamics (one recent proposal by a top physicist), etc. Even Neil de Grasse Tyson publicly admits that we don't know what it is. We simply have an observation and can measure it and put math to it, i.e. the rate at which things fall, but we have zero idea what causes it or how it works, despite Sodomite Dave's ignorant claims to the contrary. Indeed, the directionality of it is mere hypothesis, and the mythical attraction of masses on one another over a distance (something completely inexplicable) has never been proven or detected or explained. Directionality could be due to electromagnetism, flow of ether, the laws of thermodynamics, or any other such explanation. There's a top MIT professor on video teaching a class where he states that all the phenomena we observe on earth are due to electromagnetism, and by comparison the force of gravity is too weak to account for it. So dropout-after-one-class-non-Professor-Sodomite-Dave knows better than an MIT professor. Other REAL professors have put out videos debunking Dave's ignorance on other subjects outside of FE as well.
2) 8 inches per mile squared. Sodomite Dave is an idiot. Indeed, everyone admits that 8 inches per mile squared is an approximation of a more complex trigonometric formula, but it's been demonstrated to be accurate within a few feet out to distances of about 20 miles. Besides that, most FEs use various calculators to do actual measurements when considering the observations they've made. Moron Dave, that formula does NOT show a "parabola". Guy's either a total idiot or a liar. Most likely a combination of the two. While FEs throw the term out there for convenience, they use actual calculators to get the precise numbers when drawing conclusions about various observations.
So 0/2 epic fails from Sodomite Dave. If I feel like bothering, I'll expose the other 8 as well.