Mort-Hog
If moral relativism is wrong, I don't wanna be right.
Posts: 4,192
Vornskr is totally right.
'Theory' is not just another word for 'idea'. There isn't some hierarchy of uncertainty with 'guess' at the bottom and 'fact' at the top and 'theory' somewhere inbetween. It doesn't work like that.
A theory is a set of falsifiable predictions.
Newton's theory of gravity predicts that all masses will attract; more locally, all objects will fall towards the centre of the earth.
Pythagoras' theroem predicts that the square of the hypotenuse of any right-angled triangle will be equal to the sum of the square of the other two sides.
These are both theories. Should we put stickers in all geometry textbooks saying that Pythagoras' theorem is 'just a theory' and that some day God might invent a right-angled triangle where the hypotenuse is especially long? You know, just to be safe?
Now, evolution offers lots of predictions:
- 1. Darwin predicted, based on homologies with African apes, that human ancestors arose in Africa.
- 2. Theory predicted that organisms in heterogeneous and rapidly changing environments should have higher mutation rates.
- 3. Predator-prey dynamics are altered in predictable ways by evolution of the prey.
- 4. Ernst Mayr predicted in 1954 that speciation should be accompanied with faster genetic evolution.
- 5. Several authors predicted characteristics of the ancestor of craniates.
- 6. Evolution predicts that different sets of character data should still give the same phylogenetic trees.
That's a lot of predictions, and they're all very specific so they're easy to falsify. We'll come back to them later.
Now what falsifiable predictions does Creationism offer?
Ignoring the hundreds of biblical interpretations of the 'END OF THE WORLD!!' that have fairly obviously been proven wrong, ignoring the biblical claim of a geocentric solar system, ignoring the biblical claim of a flat Earth, there is NOTHING that Creationists, that the Bible, that 'God' offers as anything that can be even remotely interpreted as a falsifiable prediction.
None. Creationism isn't even a theory. It isn't even an opinion, because it cannot be logically entitled. It is faith. Nothing else. And faith is not science.
So, even if evolution is 'just a theory', it's still superior to creationism. But now let's look at what a 'fact' is.
A fact is a theory that's been proven beyond reasonable doubt. Scroll up back to those predictions.
1 has been supported by fossil and genetic evidence (Ingman et al. 2000).
2 has been found in the case of bacteria infecting the lungs of chronic cystic fibrosis patients (Oliver et al. 2000).
3 See Yoshida et al. 2003.
4 A phylogenetic analysis has supported the Mayr prediction (Webster et al. 2003).
5 On the basis of a detailed study, they found the fossil Haikouella "fit these predictions closely" (Mallatt and Chen 2003).
6 This has been confirmed informally myriad times and quantitatively, with different protein sequences, by Penny et al. (1982).
Not only have the predictions ALL been proven to be true, they have pretty much all been put to practical use. If you've ever taken antibiotics, aspirin, pencillin, you owe that to these predictions. You owe that to Darwin. Without him, you wouldn't have any of that. Without Darwin, we'd still be curing diseases by blood-letting.
This more than qualifies evolution as a fact.
If evolution were some radical fringe idea that was dubious and uncertain and highly controversial, then I might understand caution directed towards it.
If evolution were some horribly complicated mathematical model that was terribly hard to understand and generally didn't make much sense, then I might understand people having difficultly grasping it.
But evolution is neither.
Evolution is the single unifying concept of biology, every field of biology has in some way been affected or in many cases created by the study of evolution. Charles Darwin is the most important biologist ever. Our understandings of bacteria and diseases, predator-prey survival, natural ecosystems, paleontology, it simply wouldn't exist without evolution.
And it is such a beauitfully elegant idea to begin with, formed from very basic principles. A population of creatures all with slightly different properties, introduce a predator and some creatures will have properties that allow them to survive and perpetuate those properties. Some won't, and those propeties will cease.
It isn't hard to grasp.
All of the common Creationist misunderstandings can be answered with high-school level understanding of evolution. Yes, there are models that are more complicated, different types of speciation, and there is certainly discussion within evolutionary biologists about the relative significance of these types.
The discussion is not about whether evolution occurs; we know it does. The discussion is about how evolution occurs, and that is the discussion that should be going on in science classrooms.
"The trouble with the world is that the stupid are cocksure and the intelligent are full of doubt. " - Bertrand Russell
The Triumph of Stupidity in Mortals and Others 1931-1935