The Sept 04 issue of Scientific American contains an article called "Was Einstein Right?" which deals with that question in relation to quantum mechanics. The following is from that article: "Instead of presuming to reconstruct the theory from scratch, why not take it apart and find out what makes it tick. That is the approach of Fuchs and others in the mainstream of studying the foundations of quantum mechanics. They have discovered that much of the theory is subjective: it does not describe the objective properties of a physical system but rather the state of knowledge of the observer who probes it. Einstein reached much the same conclusion when he critiqued the concept of quantum entanglement--the "spooky" connection between two far-flung particles. What looks like a physical connection is actually an intertwining of the observer's knowledge about the particles. After all, if there really were a connection, engineers should be able to use it to send faster than light signals, and they can't. Similarly, physicists had long assumed that measuring a quantum system causes it to "collapse" from a range of possibilities into a single actuality. Fuchs argues that it is just our uncertainty about the system that collapses." So there we have it - the leading expert on the foundation of QM says that "spooky action at a distance" is not really a physical connection. Also, the "collapse of the wave function" is not physically real. The fact is that QM is not a description of reality. Even Bohr agreed with Fuchs when he said "THERE IS NO QUANTUM WORLD." "I've said it before, I'll say it again: Can a dog collapse a state vector? Dogs don't use state vectors. I myself didn't collapse a state vector until I was 20 years old." - Christopher A. Fuchs All the best John B.