That gives .44 odds non-existence in universe, 1.43 odds non-existence in galaxy, a ratio of 3.24, or 1.70 more bits of evidence for no (non-human) life in the galaxy compared to the universe in general.
And I forget why those two answers are allowed to be different...
EDIT: I made an error in the first calculation; as I suspected, the values are symmetric.
That gives .44 odds non-existence in universe, 1.43 odds non-existence in galaxy, a ratio of 3.24, or 1.70 more bits of evidence for no (non-human) life in the galaxy compared to the universe in general.
And I forget why those two answers are allowed to be different...
EDIT: I made an error in the first calculation; as I suspected, the values are symmetric.