Hello, I wish to start this, my first post, by saying that I am NOT trying to upset anyone, nor are my questions hoaxes. I'm no physicist either, I used to take physics in highschool, but since then, I have not pursued it further. My question is this... Is physics failsafe? Are its laws always constant? Allow me to use gravity as an example. According to my highschool books on the subject, gravity is based upon the attraction force between two objects. It is directly related to density (With greater densities exerting a greater gravitational force). But is that an absolute? If one were to put gravity to the test using the same object, well, let's go for Newton's apple. Had the situation been repeated over and over again, could there ever be a possibility that the apple would not fall? I know it sounds crazy, I'll admit, I was hesitate to post it for fear of being ridiculed, but well, from my understanding of science, it's very hard to have absolutes. Again, sorry if this came out as a hoax or something, I'm just looking for some proof. Thank you for your time.