Friday, July 15, 2016

Don’t you just assume that everything has a natural explanation?

This is another common argument in the “I don’t have enough faith to be an atheist” line of criticism. The accusation is that since atheists don’t believe in a God to perform all the creative acts that shaped the universe, we must then just believe dogmatically in materialism as an article of faith. That even if the current progress of the scientific community has absolutely no earthly idea how something may have occurred naturally, we just have to believe by assumption or presupposition that there is a natural explanation.

Of course, it should come as no surprise that I disagree with this accusation. While I’m sure there are some naturalists who believe in naturalism through pure dogma (there are, after all, some irrational people in every group), that is not the position I hold. The position I hold is that I will not believe in the supernatural until I have reasonable evidence that it is real. If we define “natural” as “anything that is not supernatural,” then you don’t have to make a pledge to believe that the natural is all there is to be a naturalist. All you need is to not believe in the supernatural. Just like not believing in God is all it takes to be an atheist (without needing to make any claims to know there is no God), naturalism can be a “negative” belief (a lack of belief in something) rather than a claim to definite certainty that the natural is all that exists.

Even so, modern science has provided us with many examples of things that now have accepted natural explanation, which previously could only be explained supernaturally. The diversity of living organisms on Earth is probably the biggest example, but there are others, like disease, weather, and planetary rotation. In times past, people have just accepted that there wasn’t any natural explanation for any of these things, but now we know that there is. So that gives a good inductive basis to expect that there might be further natural explanation for other mysteries that are yet unsolved.

Though we have that good inductive reason to expect more natural explanations, we still don’t need to assume them. In the areas where we don’t have answers yet, many naturalists have no problem saying, “we don’t know, and that’s okay.” As Michael Shermer put it, in response to a claim that something could be not be explained through existing scientific knowledge:

So what? The fact that we cannot fully explain a mystery with natural means does not mean it requires a supernatural explanation. It just means that we don’t know everything. Such uncertainty is at the very heart of science and is what makes it such a challenging enterprise.*

Let me clarify what I think he’s saying here, because I suspect someone who is less sympathetic towards naturalism may well read this quote and see it as some kind of admission that naturalists are completely closed to any supernatural explanation no matter what. But notice, the issue at play is simply that there’s no existing natural explanation for something. There’s not even a claim being made that there’s actual evidence for a supernatural explanation, just the lack of evidence for a natural one. This is not a case where Shermer has been presented with clear evidence for the supernatural and he still says “we don’t know” despite that. Rather, this is yet another case where religious people act like a simple lack of natural explanation means the supernatural explanation should be accepted by default.

With that in mind, what I think Shermer’s saying here is that if there’s no evidence for a natural explanation, and no evidence for a supernatural explanation, then it’s better to just accept that we don’t know, instead of assuming a supernatural explanation so we can feel like we’ve closed the gap in our knowledge.

This is quite contrary to the assertion that the naturalist has to assume a natural explanation without any evidentiary foundation. Shermer’s position here (which I believe is shared by many rationally-minded atheists) is that it’s better to accept ignorance than believe a conclusion which is completely without foundation. Religious people will toss out examples like the origin of life or the apparent fine-tuning of the universe, and act like the absence of a definite natural explanation means that atheists just believe dogmatically by faith. On the contrary, I contend that it’s perfectly reasonable, and demands no faith at all, to say “we don’t know what caused life to emerge, but until you give me any actual evidence that it was God, I’m not gonna believe that.” Because, if I did just assume it was God without any positive evidence (as opposed to the “evidence” of simply not having any other explanation), then I would be living dogmatically as a theist, not an atheist.

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