Given two objects, one that is a permanent magnet and a "non-magnet" that is simply magnetizable, how would we determined which is which? Can this be done just by observing the motion they induce in one another, i.e. without using any external fields, magnets, or magnetizable objects?
The key distinction between the two objects is that the poles of the permanent magnet are fixed, but for the non-magnet the locations of its poles depends on the orientation of the two objects. However I can't seem to turn this fact into a procedure for identifying the magnet.
The question comes from the first section on the chapter on magnetism from a college physics text, so the answer should be expressible in very basic terms.