You've basically just described every thread by Scyther. That guy is a complete and total moron. He believes that the earth is flat, that dinosaur bones are all a hoax, that the moon landing is fake, that the Illuminati exist and create card games that reveal their existence as a means of taunting us, and that gravity doesn't exist. Sorry if I missed any other stupid things that have easily been disproved time and time again.
These people refuse to listen to reason, citing made-up reasons that are impossible to prove (you can't supply evidence of absence in some cases that overcomes the absence of evidence). One of the popular tactics used by people like Scyther is that they ask a bunch of questions in a rapid-fire way. When you ask the same questions of them, they refuse to answer them. Take the gravity thing for example. The guy claims that there is no gravity, but rather that things float based on their weight. Air is lighter than rocks, so it floats above us. Well, what about rain? Water evaporates, lifts up into the air, masses in clouds, freezes in the high altitudes, and then comes plummeting back towards the earth in the form of ice when these warm fronts meet cold fronts. As it gets closer to the ground, the ice melts, and rain drops hit the surface of the earth. Pretty basic stuff, but if there is no gravity, then how does the water evaporate in the first place? Does it molecularly change to the point where it is lighter? No. Hot air rises, overcoming gravity until the point where the weight of the ice overcomes the ability of the winds and hot air to keep it up. At that point, gravity, the weakest of the four major forces in the physical world, wins, causing the ice to plummet towards the earth. How can Scyther explain that without gravity? What about rockets lifting off into orbit? The guy is a total quack. Admittedly, he's so stupid that he bothers me. I hope for the sake of the planet that he is incapable of reproducing. I would prefer if all genetic lines as poor as his were terminated for the betterment of the world.