Posted: Oct 07, 2011 6:49 am
by twistor59
Teuton wrote:
mizvekov wrote:Do you find it unacceptable that a physical quantity might not be thought of as a definite value, but instead as a range of possible values, each with a different probability?

For every determinable physical property/quantity there is a range of possible determinate properties/quantities belonging to that determinable one; and there is certainly nothing "unacceptable" about assigning different probabilities to the various possible determinate ones. But physical reality cannot be reduced to mere possibilities or probabilities. The real properties of spacetime points or regions must be actual determinate properties.

Emphasis mine. But that is the very heart and soul of quantum theory. A system might or might not possess a definite value of such a quantity until a measurement is made. In the cases were it does not possess a definite value, quantum theory is not making definite predictions about individual systems, but rather about ensembles of systems.

Teuton wrote:
There may be a quick random oscillation between them such no spacetime point or region has the same determinate property for longer than some fraction of a second; but for every determinate time t there must be some determinate property had by the spacetime point or region in question.

It depends on the point of view you take - maybe the spacetime point itself is an abstraction ....