There's a difference between humans not being able to guess the future beyond a probability measure, and the future not being determined from the "beginning" (o

There's a difference between humans not being able to guess the future beyond a probability measure, and the future not being determined from the "beginning" (or some time far enough in the past that humans don't really have a say in what will happen). In other words, it's quite possible that humans can't guess the future beyond a probability measure and at the same time have the universe (including their own actions, of course) being completely determined.