Abaddon,
- This is a bit of math that is difficult (at least, for me) to explain.
Could this be because you don't actually understand what you are trying to explain?
- I'm trying to evaluate the part of our current, consensus scientific theory of reality that holds that 1) any particular, individual consciousness is the result of totally specific physical events; and that 2) any particular, individual consciousness is limited to one finite lifetime at best.
Your particular consciousness exists. As does mine, and approximately seven billion other people's. Clearly, the events that gave rise to our individual consciousnesses
have occurred. The probabilities of our individual existences is 1. For each and every one of us.
All the available evidence is on the side of any particular individual consciousness being an emergent property of the person's brain, and that it ceases with brain death.
- The probability of a theory being true involves the probability of actually existing events existing -- given the theory...
Say what? The probability of actually existing events existing is 1. Because they exist.
- In other words, the "prior" probability of the event -- i.e., the probability of an event occurring, given the theory, before the event has actually occurred.
Not 'in other words'; you are looking at two completely different points in time, and the events between the two points of time change the calculated probability of 'you' as various events occur or don't occur.
- I'm claiming that my prior probability is extremely small -- given the aforementioned part of our current, consensus scientific theory of reality.
Everybody's prior probability would be similarly small, if it was possible to calculate it at a point in the past without knowledge of actual events. But given that we are not currently in the past, why are you making that calculation, and what will you use it for?
If it was possible to make a meaningful guess in 13 CE at the probability of you existing in 2013, that would give you one figure. Jump forward 10, 20, 50, 100, 1000 years or more, and that figure would be continually changing as various events occurred or did not occur.
But it isn't possible, because someone in 13 CE would have no way of being able to gauge the probability of anything about 2013, not even if humans would still be on the planet. So any probability they would calculate could only ever be a wild-ass guess, and not in the least meaningful for you to use as part of your musings on immortality.
You aren't going to come up with a useful figure. If you pretend that some other person is calculating it at some point in the past with no knowledge of the future, the figure is as meaningless as any kind of fortune-telling. If you calculate it now, the figure is 1 because you do exist.
- Unfortunately, there is a second necessary consideration. That's where the poker story comes in -- where a royal flush in spades is no less probable than any other poker hand. What makes its improbability special is that in that situation, there is at least one plausible explanation, other than chance, for getting that hand.
And what is that plausible explanation - a non-standard deck? If so, what does that have to do with the seven billion people in the world? Is it your contention that we are all cards, or fair decks, or we are all non-standard decks stuffed with aces (which are, after all, just squiggles of ink to which our culture gives value)? I hate to break it to you, Jabba, but people are not cards or decks of cards. Your analogy, if analogy it is, doesn't seem to relate to anything which you've said about consciousness.