Behaviour of quantum systems
All that is, is a quantum system, consisting of a single quantum or some combination of quanta. The quanta within an quantum system are entangled, they cannot be understood as separate entities.
Quantum systems obey the following rules:
Natural law consists of the uniformity of behaviour which results from the universe containing the same information only once.
Phenomenon explained : "There is natural law".
The most fundamental property of our universe is that it is subject to natural law. In other words, it behaves consistently, at least as far as we can tell. Any coherent theory of everything will need to account for the following: