Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!


Forgot your password?

Comment Re:Evidence of the Great Filter? (Score 1) 365

That would require the Earth to be very very special indeed, and I just don't see it.

Not at all. For example, I just generated a random number between 1 and 1e9. It was 869,502,332. By your logic, therefore, that number must have been very, very special. But no, it was just really improbable and that number happened to come up.

It may very well be the same case with life. Life could just be extremely improbable, and Earth just happened to be "the number" that was picked. This is what the Anthropic Principle is all about. Our perceptions are colored by the fact that we're here, so we think, "Since the Earth is not special, therefore, other planets must have life like Earth." It might just be that Earth was the lottery winner.

I said this in another post, but I'll say it again: The best evidence against life being common is the fact that it only happened once on Earth. It's fairly conclusive that all life on Earth has a common ancestor. If abiogenesis were easy and common, it wouldn't just stop once it happened one time, it would happen continuously over the billions of years since it happened for us. But it didn't.

And honestly, life on Earth being completely unique in the universe isn't that hard for me to believe when I look at the utterly insane complexity of cellular machinery. But again, extreme improbability doesn't matter when we're deal with the anthropic principle. We don't sense how long it took for intelligent life to pop up, just like we didn't sense the 13 billion years until you and I were born to think about all this.

Comment Re:Evidence of the Great Filter? (Score 1) 365


We have zero evidence for life being likely, except wishful thinking in the form hand-waving like the utterly useless Drake equation. On the other hand, we do have some suggestive evidence that life itself is improbable. The biggest evidence is that, as near as we can determine, it only happened once on Earth. If life was probable, it should have continued to re-occur, but we're fairly certain that all life has a common ancestor.

Comment Re:Evidence of the Great Filter? (Score 1) 365

More like, "it's how it was in the beginning. We all know at this point it's a dumb idea and a huge mistake, and Reddit has proven that editing can work and work well, but we're too set in our ways to admit it's a mistake and thus we'll call it 'working as intended' and pretend that it serves a purpose." See also: Deleting accounts.

Comment Re:Evidence of the Great Filter? (Score 1) 365

> I think life at the single cell level might be fairly common. I actually think the single cell is the hard part. People underestimate just how INSANELY complex single cell organisms are. I don't mean a little complex, I mean crazy complex. Look at this animation of DNA replication: https://www.youtube.com/watch?... One side is duplicated straightforwardly... the other side has to be taken apart, flipped around and reassembled... and this is only one example. It gets even crazier from there. We tend to think of cells as "simple life forms", but they mind-blowingly complicated machines. It would not shock me at all if there was no other example of single cells in the entire universe.

Comment Re:Evidence of the Great Filter? (Score 5, Insightful) 365

My personal opinion is that life is really, really, really, REALLY rare. It only seems like it ought to be common because of the Anthropic Principle. We're can observe ourselves and thus it seems like life is easy. But everything would be exactly the same if we were completely unique in the universe. In fact, if the universe were cyclic and it took 1e1035 universe cycles for life to happen, things would look exactly the same. We simply have no basis for knowing how probable it is. Given how insanely complex we are, I suspect that it's exceedingly rare.

Comment Re:Weird article (Score 1) 14

The bizarre thing is that you're accusing me of "singling out one particular issue based purely on the person implementing it," when you have literally no example of me ever doing that, ever, least of all in this discussion, where if anything I was taking Gruber's side.

You have mail.