So I've heard of the many worlds interpretation - something about any event that could have happened in the past, really did happen in some parallel universe. What I want to know is - how does this translate into personal choice? Like, say I am considering some decision. Tonight for dinner I will eat either chicken or fish. Does the universe branch out into a significant portion in which I choose chicken, a significant portion in which I choose fish, and a significant portion where both or neither happen, or is this not really how it work? Are most (>99%) of the universes going to have me choosing, say, the chicken regardless, and only a small portion where something else happens? I mean, obviously if I throw a ball through the air, in most of the universes, it is going to follow a well defined path, assuming nothing interferes with it. Is a human choice a similar event to this? i.e. one that is fairly certain to follow a well defined path, or is there something about the complexity and electrical pulses of the brain, or our unified field of consciousness, that makes humans not like this? I think quantum uncertainty might be related to this? Like, the way an electron moves might be uncertain. But the way the ball moves is basically certain. Does quantum uncertainty apply to lifeforms, so that their actions too could not ever be mostly predicted (perhaps due to the working together of tiny parts in the brain like neurons and electricity, I'm not entirely sure what the mechanism would be), or are they predetermined to a high degree like the ball is?