Can the probability of God existence change?

[Piers]

[ QUOTE ]
I understand what you're saying, but this is off the point. The question is if the odds of other intelligent of life forms go down (say the human race is now 20 billion years old and has yet to come across any evidence of anyone out there), does this effect the probability of God's existence?

[/ QUOTE ]

Talking to someone and thus changing some small part of your perception of God will probably have a much larger change in the likelihood of God existing than any indication of extraterrestrial life.

Or to look it another way; Consider the interval of the real line corresponding to the range for probabilities of God existing, corresponding to all sensible looking perceptions of God (whatever that means). If some bacteria were detected on Triton (Or a two headed humonoid form Betelgeuse wrote a top selling book), I think the change in the positioning of the interval would be negligible compared to the size of the interval.