No, I haven’t gone all anti-science or become a creationist, I just needed to grab your attention to highlight a serious issue I have with supposed scientists like Richard Dawkins. This article has been brewing in the back of my mind for months now. For most of its gestation period it went under the working title ‘absence of evidence is not evidence of absence’, but it was missing a focus to build around, Dawkins provided that focus, and the ten year anniversary of the death of Carl Sagan provided the spark to get this out of my brain and onto ‘paper’ as it were.

I consider myself a scientist, I chose to do a science degree, then chose to go back and try for a PhD in science, and took the time to get myself elected a fellow of the Royal Astronomical Society. As such I have a very personal interest and involvement in science, scientists, and the public perception of science. I’ve shared some of my reflections on the nature of science on this blog before (see links below) but those reflections didn’t really get to what I now realize is at the very core of science, knowing that there is a lot that we don’t know, and a need to be open to the possibility that we’re wrong. Science does not move forward by digging its heals in and refusing to accept changes in our understanding of the universe, and science is most certainly not served by speaking in absolutes and making unsupported and indeed unsupportable statements in the name of science.

[tags]Science, Creationism, Dawkins, God[/tags]

To me one of the central issues can be summed up with a very simple statement that gets hammered into every undergraduate archeologist:

Absence of evidence is not evidence of absence.

Whenever you hear scientists categorically state that something does not exist because we have no evidence for it, alarm bells should start ringing immediately. The first spark for this post was ignited when I was listening to a science podcast a few months back and heard a supposed scientist categorically state that there is no such thing as telepathy because there is no evidence for it. As a scientist you cannot do that. You have to remove yourself and your emotions from the topic and look only at the evidence to make logical deductions and assertions. It is completely scientific to say that despite numerous attempts to find evidence of telepathy none has been found, it is not acceptable to state that it does not exist because of this lack of evidence. It is even acceptable for scientists to express personal opinions based on scientific research provided it is clear that they are expressions of opinion and not fact. You can say that no one has been able to find evidence of telepathy despite numerous attempts and that you believe this to be because telepathy does not exist. But you cannot say that science proves that telepathy, or ghosts, or telekinesis, or a sixth sense, or indeed, God, does not exist.

When scientists make these kinds of unsupportable statements about something like telepathy they sometimes cause a little controversy, but not much, and they don’t really damage science in the eyes of the average person on the street, but if you add God into the mix things heat up very quickly! I’ve always said that anyone who looks for scientific truths in religious texts is deluded. But it works the other way around too. I also consider anyone who tries to get religious truth out of science to be deluded. The Bible cannot prove that the world is flat, nor that the Earth was made six thousand years ago, but equally, science cannot disprove the existence of God. Sure, science can influence your personal faith, but you cannot use science to make absolute pronouncements about the existence or nature of God. I personally find that science feeds into my spirituality as it gives me a great sense of wonder about the universe around me and makes me ask myself ‘why’, but that’s not what I’m talking about here. I’m talking about people using science to attempt to justify making absolute pronouncements about the nature, or indeed existence, of God.

Of all the people who attempt to (ab)use science in this way, Dawkins stands out above all others. He does not believe in God, that’s his prerogative. He is also perfectly correct in stating that there is no scientific evidence for the existence of a God because there isn’t. However, he goes much further than that, he states that science shows that God is a delusion, and that’s the point where he crosses the line from science to faith. Dawkins’ statement that God is a delusion is fundamentally no different to intelligent design. Neither is scientific, both are logically flawed, and both do as much harm to science as the other. Intelligent design is a delusion rooted in a refusal to accept that the existence of God cannot be proven, and Dawkins’ scientific disproof of God is a delusion based on a miss-understanding of science, or a science delusion if you will. It is a logical fallacy to use absence of evidence as evidence of absence!

When we are thought science in school we think of it in terms of laws and equations and facts, which sets us up to think of science as static and rigid and set in stone. It also gets us comfortable with the idea that science can speak in absolutes, and that’s at the very core of this problem. Science is a current best-guess at how the universe works. It’s a best guess that has to be firmly rooted in observation and experimentation, but a best-guess none the less. Science cannot prove anything, only lend support to ideas and disprove others. Science does no know everything, it is not categorically right, and hence it has to constantly be open to change. It is not about absolutes and once you start speaking in absolutes you make science rigid and inflexible and effectively slam on the brakes. In my mind a science education should start by driving this home to students, not by making them memorize laws and equations without appreciating how they were arrived at and the weight of evidence that under-lies these current best-guesses.

There is one obvious danger when trying to get across this best-guess idea and that is what I call the It’s only a theory syndrome. Yes, evolution is only our current best-guess but there is an absolute wealth of evidence supporting it and in order for any other theory to supersede evolution as our best-guess it will have to have at least as much support and be at least as good at explaining the world we observe around us. Although it is exceptionally un-likely that our current understanding of evolution will prove to be completely right the fact that it does so well at explaining the universe makes it a very compelling theory and implies strongly that there is truth in it. Newton’s laws have been shown not to be the whole truth, but that does not take away from the fact that they do give us a very good approximation of how the universe works at the scales we experience in our every-day lives. There is truth in them, but they are not the whole truth.

I’ll end by calling on all scientists reading this to stand up and correct anyone who speaks in absolutes in the name of science, or who does not understand that absence of evidence is not evidence of absence. I’d also call on those who teach science to try to impart an understanding and a love of science and the scientific philosophy and method to their students, as well as teaching them the details of our current best-guess at how the universe works.

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