Two Laws That Can't Both Be True

What happens when the most successful scientific theory ever devised can't explain its own central procedure: measurement? In this lecture, David Albert lays out the deep crisis at the heart of quantum mechanics. He begins with the astonishing predictive success of the quantum algorithm, then reveals the tension between its two fundamental laws: the smooth, deterministic Schrödinger equation and the abrupt, probabilistic collapse that occurs during measurement. Albert contrasts Bohr's radical response (that physics should abandon the ambition of telling stories about what particles actually do) with Von Neumann's attempt to formalize two distinct laws, one for measured systems and one for unmeasured ones. He then follows the problem to its strangest conclusion through Wigner, who argued that consciousness itself might play a role in physical reality, arriving at a form of mind-body dualism reminiscent of Descartes. The lecture makes vivid why this isn't merely a technical puzzle but a genuine crisis for the scientific project.