Hello to everyone. I feel quite humble to be posting on this physics forum as I am not a physicist but I am in awe of such great minds. However, I do have a general interest in physics as I am an engineer. Unlike my father is an electronics design engineer for whom is the reason for my posting this. I need some proffesional insight into why Anti-Gravity is impossible as my father seems to have worked out how to overcome gravity using one way inertia. Is it Isaac Newtons third law that prevents this? I have been reading and researching a lot on the internet and it seems that the third law may have some flaw. Please help as I am confused.