For example, Newtonian physics is very nearly true, except near very strong sources of gravity, or at very, very high speeds, or in the microscopic world of atoms. The needed modifications to Newtonian physics, repectively general relativity, special relativity, and quantum mechanics, hardly influence daily experience, and it took a long time to discern that Newtonian physics demonstrably failed in these regimes. (And, all of these theories reduce to classical Newtonian experience in the limits of low gravity, slow speeds, and large quantum number.)
I don't know how much longer I can continue to work in obscurity and sacrifice my heath for scientific progress. I could really use some grant money, if you know of anyone. I'd be more then happy to have you co-write and share in the research.