| I'm still not sure exactly what you mean by metaphysics (yes, I can define it, but I wasn't the one who raised it). My first guess was that you mean anything that does not lie within the physical realm. But this would include logic (or, more tellingly, logical systems). I suspect that is not what you intended, but I see no other interpretation for what you wrote.
The problem with you example is, however, pretty easy. If, as you say, one person choses to act on the basis of a metaphysical belief and impose those actions on others, then this can be a cause for problems. But, as I stated, the notion that only measureable factors are considered knowledge is a metaphysical statement. Then acting on this belief, and imposing it on others, is logically identical to any action/imposition on the basis of any other system of belief (because one cannot compare metaphysical systems). Either it's essentially wrong, or it's essentially OK (dependant on the content of the specific actions, which is a whole different debate). |