Theories with problems: by Keith Mayes The Big Bang, Quantum Mechanics, Relativity, Time, Light Speed, Gravity, Electromagnetism, all have their theories that attempt to explain why these things are the way they are. These theories form part of our understanding of the fundamental laws of the universe, but are of course unable to provide all the answers.
All theories have problems in as much they can not be proven to be correct, theories are only theories, not proven laws. They do not necessarily accurately describe the way things really are, they are constructed as a working model that is a useful aid to our understanding, and as a method of predicting future outcomes. When a theory is found to be wrong, it is either discarded, or as is more generally the case, modified, until it again appears to match the observations. A theory, no matter how well it appears to accurately describe any phenomenon, is provisional, it can never be proven to be correct, but it may be proven wrong. It will therefore always be impossible to claim a final theoretical solution to anything.