I am not working in the field of entanglement, but I am an NMR spectroscopist, so I work with spins. The spin *is* really only up or down (or a combination of the two), but not ever some "angle" in between. Probably the most correct definition of electron spin is Wolfgang Pauli's original statement: "Classically non-describable two-valuedness." Trying to rationalize it as something spinning is incorrect and will generally lead you to false conclusions. In NMR spectroscopy, different nuclei couple to each other and the different spin states produce separate distinct peaks for each value of their neighbor's spin states. Collections of multiple nuclei produce binomial patterns, but each nucleus is always in some particular state or perhaps a superposition of different states, which is not the same as "being in between" different states.