An analysis has been performed of the theories and postulates advanced by von Neumann, London and Bauer, and Wigner, concerning the role that consciousness might play in the collapse of the wave function, which has become known as the measurement problem.
giving out or weakness of the knees can have different causes. These can include problems outside the knee joint itself (weak muscles for example) or inside the knee (torn ligaments or cartilage). See an orthopaedic surgeon to address your individual problem.
Knee replacements: There are multiple causes of post-operative knee pain/stiffness after knee replacement. Your pain seems to be located mostly in the outside of the knee. This could be from impingement of the knee replacement components on the soft tissues.