Sunday, October 28, 2012

But how shall we follow probabilities?

Loftus: We should think exclusively in terms of the probabilities.


VR: How in blazes do you calculate probabilities? Probability theory tells you how you get from a prior probability to a posterior probability. What it does not tell you is what prior probabilities are correct. Hence I can begin with a probability of 1 for the Resurrection and end up with a probability of 1 for the resurrection. Ditto for a probability of zero. So telling me to think exclusively in terms of probabilities tells me squat. Probability theory does tell you how, given enough evidence and a small enough split between probabilities, we can come to an agreement about whether something is true or not. But if there is a large split between antecedent probabilities, we can easily have rational people taking opposite beliefs to their graves.

I happen to think that there are no right or wrong antecedent probabilities. We start with the probabilities we have and go from there. My view is that a Bayesian-rational person can conclude that Jesus rose from the dead.

No comments:

Post a Comment