[PatrickHenry]

I'm a bit perplexed why the writer would have included Drake in the article. Sort of made me think...wtf??

Uh ... because it's part of the paradox? The Drake Formula suggests that intelligent life should be abundant. Observation contradicts that conclusion. So ... where are they?

[Focault's Pendulum]

So ... where are they?

Well...I wound up in New Jersey....I can't speak for the others.

[ThirdMate]

There is another argument to suggest that intelligent life is rare or unique. That is the simple observation that we are the only intelligent species on Earth.

If conditions are ideal on earth for the development of one intelligent species, why haven't two species developed? A strong conclusion would be that we are unique.

rgds,
3/M

[RadioAstronomer]

Observation contradicts that conclusion. So ... where are they?

Separated by time and distance if they exist.