[saurik]

Ok, fair, so, to try to apply this to my analogous crime: I would agree that attempted murder does need a definition of "murder"; but, the crime does not care whether your specific plan would have led to an act of murder, only whether or not the defendant was trying to murder.

We thereby do not necessarily need a way to know whether reading--either your book or any book--is addictive or not, but only the extent to which you were going out of your way to make it addictive, for which I think it might then be OK to have some specific-yet-contrived definition that is difficult to apply to any specific product but feels like a wrong thing to do (maybe my "exploit human psychology or physiology")?