The fact that an idea is rejected is not, on its own, evidence that it's any good. However, great ideas are often not "obviously" good, because if they were, s

The fact that an idea is rejected is not, on its own, evidence that it's any good. However, great ideas are often not "obviously" good, because if they were, someone would have done them already. And if they're not obviously good, they'll tend to be rejected when they're first discussed. This is even true when the idea is explained to experts in the relevant field field, because the experts think they know how things are done, and a really great idea is usually sufficiently different from their and habitual modes of thinking that it will seem inconsistent with what they have long "known" to be true. If you have an idea and it's rejected, it probably should be. But if you have, in fact, thought it through in more depth than anyone else, and actually know more about its part of a field than the most experts in that field do, then it might be right. You have to take full responsibility for deciding that; during the critical time of an idea's gestation, no one can take that responsibility for you. Eventually, if and when the idea is made real, it will be verified in the real world.