The Heisenberg uncertainty principle is a key theoretical limit on the precision with which certain pairs of physical properties of a quantum state, such as position and momentum, can be known. In the Bohr-Heisenberg formulation of quantum theory, also known as the Copenhagen interpretation, the Heisenberg uncertainty principle is taken beyond a mere theoretical limit on the precision with which measurements can be made on quantum systems, and is instead interpreted as a fundamental property of the universe in which there is a certain level of intrinsic indeterminacy that places unsurpassable constraints on the degree of certainty with which any measurement of complementary variables can be made.

This of course, is according to the Bohr-Heisenberg theory of quantum mechanics, and essentially argues that the absolute uncertainty and irreducible limitations on the possibility to obtain certain knowledge about a quantum state reflects the inherent meaninglessness of actual, real...