Philosophy of physics is a branch of philosophy that deals with the validity of logic and nature of truth (epistemology) in the physical sciences. Modern questions and problems also involve inquiry into the nature of space and time, geometry, probability and quantum mechanics. The task of scientists and philosophers is to determine what knowledge is, how it is acquired, and on what basis it rests. It is thus the work of philosophers of science, especially those scientists who have sufficient expertise in physics that allow them to accurately and completely evaluate physical theory, to interpret scientific theories, experiments, methodologies and results. Typical issues that arise out of such inquiry include the role of probability in statistical physics, the interpretation of measurement in quantum mechanics, and the philosophical presuppositions of space-time theories.

Before the Scientific Revolution, philosophers relied upon logic and reason to explain natural...