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.
Also called a loose body or joint mouse, this can become caught in your joint, causing your knee to buckle and even catch.. The buckling you describe may be caused by instability of the knee due to weakened ligaments. Loose bodies can form because of trauma, because of a broken-off osteophyte (bony spur), or because of osteochondritis dissecans, where part of the bone loses circulation and fragments.