In a search for the truth (laws of nature) the principle of sufficient reason is a guideline that has to be applied.
Physics (from Greek φυσική (ἐπιστήμη), i.e. “knowledge of nature”, from φύσις, physis, i.e. “nature”) is the natural science that involves the study of matter and its motion through space and time, along with related concepts such as energy and force.
More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.
The principle has a variety of expressions, all of which are perhaps best summarized by the following:
- For every entity X, if X exists, then there is a sufficient explanation for why X exists.
- For every event E, if E occurs, then there is a sufficient explanation for why E occurs.
- For every proposition P, if P is true, then there is a sufficient explanation for why P is true.