From Stuart Hameroff, the collaborator on many of Penrose's papers
on quantum consciousness:
Roger Penrose (1989; 1994; 1996) has proposed that isolated quantum
systems which avoid environmental decoherence will eventually reduce
nonetheless due to an objective threshold (objective reduction -
Offworld :
Roger Penrose (1989; 1994; 1996) has proposed that isolated quantum
systems which avoid environmental decoherence will eventually reduce
nonetheless due to an objective threshold (objective reduction -
OR) related to an intrinsic feature of fundamental spacetime
geometry (see