A chance of 0 or effectively 0 is not conducive to a rational analysis of the situation. And I don't think there's enough evidence out there for a probability that small.
What probability do you actually think I should assign? More or less than to me winning the lottery if I buy a ticket? Is winning the lottery an infinitesimally small chance or should I actually consider it?
Why not ? What probability would you put on the proposition that the following things exist ?
* Tolkien-style Elves
* Keebler Elves
* Vishnu, the Preserver
* Warhammer-style Orcs
* Thor, the Thunderer
* Chernobog/Bielobog, the Slavic gods of fortune (bad/good respectively)
* Unicorns
I honestly do believe that all of these things could, potentially, exist.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.