In sci.electronics.repair, on Sun, 16 Aug 2015 17:52:04 -0700, Jeff
Liebermann wrote:

On Sun, 16 Aug 2015 18:24:42 +0000 (UTC), ceg
wrote:

On Sun, 16 Aug 2015 11:32:55 -0400, micky wrote:
Why is that a paradox?

I thought the paradox was clear by my Fermi Paradox example.

Think again. The Fermi Paradox is better stated as:
"Absence of evidence is not evidence of absence".
Much of this has its basis in theology where wrestling over the
existence of God is an international sport. A more simplistic version
is that you can't prove anything with nothing as evidence.

The corollary also doesn't work whe
"Quantity of evidence is not evidence of quantity".
In other words, just because you have a large pile of numbers, doesn't
mean you can prove a large number of things.

The problem is that the "Fermi Paradox" is the logic sucks.

"The great Enrico Fermi proposed the following paradox. Given
the size of the universe and evidence of intelligent life on
Earth making it non-zero probability for intelligent life
elsewhere, how come have we not been visited by aliens? Where
is everybody?, he asked."

No matter how minute the probability of such life, the size
should bring the probability to 1. (In fact we should have

The thing is that probabilty on a yes or no question is only valuable
for betting parlors and insurance brokers, which are really the same
thing. One may thing the probability is very high, because there are
so many places life could be, but if there is no life beyond the earth,
it doesn't matter what the probability WAS.

It is partly tied up with theology, iiuc, in that some believers in God
want to believe that this earth is his only creation. I don't know why
they would think that either.

Another problem, IMO, is that scientists, as reported by the news, seem
to think life could only be water based, and seem to discount places
without water. . I know water has advantages, but it's not the only
possibility.

Still, I wouldn't be surprised if there were no life anywhere else.
There are cerrtainly lots of places beyond earth with no life, so why
not more.

OTOH, if there is life, I see no special reason they would have a radio
transmitter. Until I got a cell phone, I didn't have one.


been visited a high number of times: see the Kolmogorov and
Borel zero-one laws.)

So, what's missing? Well, it's time or rather how many solar
revolutions a civilization can exist without destroying itself or
having some cosmic catastrophe do it for them. The details are worked
out in the Drake Equation:
https://en.wikipedia.org/wiki/Drake_equation
which computes the probability of two civilizations coming into
contact. If you happen to be a pessimist, and use pessimistic
probabilities, the probability might as well be zero. Inflating the
statistical population to astronomical proportions does nothing to
change the probabilities and certainly will not result in a 100%
chance of an alien encounter.