Tag Archive for 'creationism'

Applying Logic to Creationism / Evolution

A little while ago, and for no apparent reason (I’m like that :) ), I thought about an Internet poll I’ve seen some time ago, which asked people what they thought was more likely about the development of life on Earth. If I remember correctly, the options were something like this:

  1. God created the species as they are, less than 10,000 years ago (young earth creationism);
  2. God created the species as they are, millions of years ago (old earth creationism);
  3. God created life and directed evolution, starting millions of years ago (theistic evolution);
  4. Life evolved without action from a god (natural evolution).

And it got me thinking…

We can think of the several hypotheses as a series of switches. God (as in “interfering”, not as in “existing”)? Yes or no. Old Earth? Yes or no. Evolution? Yes or no. With these switches, here are the 8 possible combinations (with 0 for “no” and 1 for “yes” — yes, I’m a computer geek. :) ):

God? Old Earth? Evolution?
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1

This is the initial premise. But we can quickly remove a few contradictory combinations. For instance, no God and no evolution means that nothing accounts for the life we have in the world today. In other words, we can’t have a “0″ for both God and evolution. Evolution but no old earth is also impossible: nobody — scientists or creationists — claims that species could have evolved in just a couple of millennia, and both sides agree that man already existed 6,000 years ago. In binary terms, evolution requires an old earth (not the other way around, though).

So, the cut-down table (now with labels for each combination) amounts to this:

  God? Old Earth? Evolution?
A 0 1 1
B 1 0 0
C 1 1 0
D 1 1 1

What more can we say about them? Well, for a start: evidence contradicts B and C, so they cannot be true. There is lots of evidence for both evolution and an old earth, and both are accepted by science — not dogmatically, not on authority, but because that’s where the evidence leads. The only reason people still claim B or C is this: it’s what the holy books claim. If you believe they are inerrant, then any evidence to the contrary must be ignored, like covering your ears with your hands and crying “la la la, I can’t hear you”. Of course, such a position is irrational, dishonest, and stupid. Creationism (old earth or young earth) is the denial of reality; it’s not a scientific hypothesis with any merit, because no evidence supports it, and a lot of evidence contradicts it. I can respect people who are honestly mistaken, but not those who lie to themselves, who deny reality, just because it’s somehow uncomfortable or contradicts dogma.

So, if we care the least bit about reality, we must remove any combination with Old Earth=0 or Evolution=0. Therefore, the only remaining combinations are these (keeping the labels from the previous table):

  God? Old Earth? Evolution?
A 0 1 1
D 1 1 1

Now, D is obviously theistic evolution, that is, evolution directed by God. This is undisprovable, because it doesn’t contradict the evidence (but, then again, Last Thursdayism, the theory that the universe was created last Thursday, but with everyone having memories of a fictional time before that, and with the world having been created to appear much older, is also undisprovable). There is, however, no evidence for it, either.

A is not necessarily atheistic naturalism; as I said before, “God” here means intervention by God, not just existence. A can be naturalism, but it can also be Deism. Again, it can’t be disproved, and, again, there is no evidence of “no (intervening) God”. The main difference between A and D is that D adds another agent, which is not required, as A has the exact same evidence for and against it, and explains everything just as well. If both explanations are equally satisfactory and substantiated, but one of them has an extra entity, then Occam’s Razor tells us that the other one — with the least number of entities — is the most likely one. Entities should not be multiplied beyond necessity, and the extra entity is unnecessary.

From this, we arrive at A as the most likely hypothesis. All available evidence agrees with it, and it is the simpler (in terms of number of entities) explanation.

Creationism / ID and Evolution

I’ve recently read a comment, and a reply to another comment, in Slashdot, in the “Creation Museum opens” thread. I think both are brilliant. I won’t quote them in full here, but I’d recommend their reading to anyone.

From the initial comment:

I’ve noticed that many slashdot articles about evolution seem to attract a sizeable number of creationists. Because of this, I’ve decided to address the serious (i.e. non-trolling) creationists that frequent slashdot in the hope that I can prevent you from making the same easily avoided mistakes that make so many of your brethren sound like ignorant cretins. Here are some common arguments that creationists use, and why I think that you shouldn’t use them… unless of course you want to be ridiculed. Note: this is by no means a comprehensive list.

(1) “Evolution is just a THEORY”

This is the most common (and the most disappointing) creationist argument I hear on a regular basis. While it’s true that evolution is a theory, this statement is made in an attempt to cast doubt on evolution by implying that evolution is akin to a wild guess that scientists came up with after a night of heavy drinking. Newsflash: it’s not going to work. Most educated people understand that you’re confusing the word “theory” (which means an explanation or model that is capable of predicting future events) with the word “hypothesis” (which means an educated guess). Calling evolution a “theory” isn’t an insult. For the millionth time, I will repeat this: gravity is also “just” a theory (for example, google the “General Theory of Relativity”). I might even add that most scientists would consider evolution to be a better-supported theory than gravity, because of the fact that gravity cannot (currently) be quantized, despite decades of attempts. If you want to debate evolution, fine- but don’t play these childish word games.

Of course, it goes on. Really, read it.

And from his reply, to another user who suggested he participate in a public debate about evolution / creationism:

(2) Creationists often make statements like “Evolution can’t produce new information in a genome” or “We don’t know how old the earth is because carbon dating isn’t useful on large timescales and we don’t know the initial amounts of isotopes and polonium halos disprove old ages anyway”. Answering each one of these statements would require hours of boring, dry lecturing- something that simply isn’t going to happen. And the problem is that creationists don’t just make one of these statements, they make DOZENS of them. Answering this kind of deluge of mis-information in such a way that it can be intelligible to the average person would take an unbelievably long amount of time. As such, even answering questions from the crowd can be a tricky business. How do you explain isochronology and radioactive dating methods in 2 minutes to a young earth creationist? I can barely explain it to a fellow scientist in less than 15 minutes. Now imagine someone standing up and asking two or three of these questions in rapid fire mode, and ridiculing you for not having a snappy answer. This kind of public failure would not look good.

Again, follow the two links and read the entire comments. The first one is “print out and give to friends and family” material, and the second explains the frustration of discussing science with non-scientists to whom “quick, easy answers” (such as “God did it”) often sound a lot better than the inevitably more complex truth.




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Creative Commons Attribution-NonCommercial-NoDerivs 2.5 Portugal