ABSTRACT
From a naive realistic outlook, the most astonishing feature of spin-half particles, no matter what direction we choose as a reference for a measurement, the spin is either parallel or anti-parallel to the chosen direction. (I will call these objects ‘particles’ for convenience only; they are waves showing particle properties only in interactions.) As this choice can be made at will at any moment before the detection it seems as if the spin particle has no intrinsic spin. A particle can be said to have spin up (or spin down) when interacting with a detector, otherwise not. On the other hand, however, under certain circumstances we can anticipate the result of a spin measurement, which seems to suggest that spin is attributable to the object independent of any measurements.
