The question of whether religious believers are less intelligent than non-believers surfaces every now and again. The atheist blogs I read are usually courteous enough to say that of course believers are not less intelligent, and there are no studies that I can find that have considered the matter.

Evidently there have been intelligent Christians; C. S. Lewis comes to mind, Francis Collins of the Human Genome project and William Lane Craig are evidently intelligent men. (I can’t think of any obviously intelligent women who subscribe to religion; I suspect intelligent women are intelligent enough to avoid superstition altogether.) It seems to me though that what those who profess religious belief are prepared to do, is sublimate whatever intelligence they have and sacrifice intellect in the service of faith. They suppress their critical faculties, usually through a form of cognitive dissonance, and press rationality into the servitude of beliefs that have been arrived at irrationally. I might be wrong of course, but this what the evidence suggests to me.

A recent commenter on this blog by name of tides99, does seem to support to this hypothesis. tides99 originally wrote to say how his chosen superstition, Catholicism, is the one true way (aren’t they all) and that while I’m right to criticise Protestantism, I really should investigate Catholicism for myself. When I declined his very generous offer, tides99 responded – you’ll find his comments in ‘the author’ section above – with a number of points about the limits of human reason. It is these I take apart respond to here.

tides99: I have a PhD in philosophy, so I certainly would not believe in anything that goes against reason or requires one to repress or contradict one’s critical faculties.
For one who professes a PhD in philosophy, tides99, there is some very sloppy reasoning here and throughout your argument. Already in this first sentence we see the contradiction between belief and reason; they are not the same and can’t ever be; belief doesn’t require reason. That is why it is often called ‘faith’.

Criticsl (sic) reason is only one way of encountering and assessing reality… You’re right, tides99, but not for the reason you think. Critical reasoning is one way of assessing reality, but is insufficient on its own. It needs the support of evidence. Evidence is supplied by science and the methods used in scientific enquiry that seek to eliminate, as far as possible, human bias and presupposed conclusions.

and there are aspects of reality that reason cannot adjudicate because it cannot access them. If there are aspects of reality that reason cannot ‘adjudicate’ (whatever that means) and that science cannot access, then how do you know these supernatural aspects exist? You feel them? Your church says they do? You’d like them to? Maybe so, but none of these mean that these mysterious ‘aspects’ really do exist. You’re sneaking supernaturalism in through the back door here, tides.

Rationalism is itself based Upon faith, of faith… Oh dear, this old chestnut.

in the ultimate intelligibility of the universe, and its perfect transparency to human reason. Is rationality really based on these things? Scientists concede there may be aspects of the universe which, while we might observe them or extrapolate mathematically, we might never properly understand or be able to explain. This doesn’t, to my knowledge, prevent the exercise of rationality.

This of course cannot be proven, yet you believe it anyway. Scientists and free-thinkers rarely go in for ‘proof’. Your use of the word makes me suspicious of your claims about your credentials. Things can be proven mathematically, it’s true, as can matters in a court of law (beyond reasonable doubt) but by and large science is more interested in theories, working models and demonstration. So, no-one is looking to ‘prove’ that the universe is ultimately intelligible and no-one ‘believes’ it is perfectly transparent to human reason. This is a strawman argument, tides.

It’s quite superstitious to have such faith, but yet have nothing really to ground it on. Whatever reason and rationality are based on, it is not faith in the universe’s intelligibility or transparency. The use of reason and the application of the scientific method are nothing like ‘faith’. Both are tools, and they are the best we have.

The truth is that the reason why reason exists is because the universe is ordered… Beware any statement that starts ‘the truth is’! Reasoning is a manifestation of the human brain. It is not something that has discreet, independent existence. It has not been floating around for aeons, out there somewhere, waiting for advanced apes finally to discover it and make it their own. The only reason reason exists is because the human brain evolved to the extent it became capable of reasoning. All the same, the brain did not leave behind its capacity for irrationality, unreasonableness and disorderly impulse. Might we not then claim, this being an equally viable proposition, that because these are human traits of even longer standing than our capacity for reason, that the universe must therefore also be irrational, unreasonable and disordered? Of course not, because the universe’s characteristics are not a reflection of the human brain’s abilities, and vice versa. The inclination to project human behaviour onto an impersonal, indifferent environment – to anthropomorphise the universe – exemplifies our irrationality, not rationality.

But, just a minute, we have another contradiction here, tides99. You have already speculated that there are aspects of reality beyond our grasp – and yet here you are telling us that, along with the rest of the universe, these supernatural aspects are ordered. How do you know this? How do you know anything about parts of reality which reason cannot ‘adjudicate’ and science cannot access?

and the reason why it’s ordered is, of course, because there is an orderer, namely God. And there we have it. It’s God. Of course it is. Far from demonstrating that the universe is ordered, you now conjecture that the order you claim for it has an orderer behind it. Yes, it’s another leap of faith, reason be damned. Anthropomorphising the universe leads inevitably to deities and, ultimately, the Christian god, who is merely ourselves writ large.

Speaking for myself, anyway, I can say this much. When I was an undergrad I came across the saying that learning a little philosophy leads you away from God, but learning a lot of philosophy leads you back. As a young man who had learned a little philosophy, I scoffed. But in later years and at least in my own case, I would come to see that it’s true.

It’s no good blaming a surfeit of philosophy, tides99. If what you say were true, all philosophers with PhDs would have reached conclusions similar to your own. The majority haven’t.

To summarise your argument, you claim – without evidence – that there are supernatural aspects to the universe/reality which reason and science can’t detect. You assert that nevertheless the universe as a whole is ordered and it follows therefore that there must be an orderer. This orderer, you then go on to assume, is the very God you’ve chosen, for entirely irrational reasons, to worship.

Science and reason tell us that every one of these assertions is wrong. You are projecting your beliefs onto the universe as you perceive it, tides99. Project away, by all means, but remember, these beliefs and your version of reality are only in your head. The real universe as science, and, I’d venture to say, reason demonstrate, is busy doing something else entirely.