So, let's think of a world where all the decisions are made by probability, e.g. flipping a coin, and quantum physics was never discovered. Now, let's say they use a device, a contained version of the double slit experiment, except that the particles are supposed to land in one of two different "rooms" that are exactly the same - that won't happen, of course. They always open the right room, so that if the particle is there it won't be in the other room, and so on. Now, as we know, the particle will be in a superposition of states, in both rooms at the same time, until observed. But since the only open the right room, and therefore only observe the particle in the right room, so in this way can we directly control probability? Again, sorry if my information is wrong. I'm new.