Thursday, February 10, 2011

An Important Difference

Last night, Sam Harris tweeted a link to a debate he had participated in a few years ago on the subject of religion's role in the end of the world. The debate itself is mostly awful, as these things tend to be, with the moderator helping Harris's opponent pile on him to the point that a frustrated audience member finally cries out "You're the moderator!" I'll link to the first clip, though, for the sake of a reference:



Something interesting did emerge in the course of the debate, though, namely the extent to which Harris's religious opponent seems to rely on his own personal experience as his most important source of evidence, and the extent to which his compatriot the moderator is instantly willing to accept that experience as better evidence than any of the statistics Harris offers in return.

Of course we already knew that this was true of religious people to some extent. Powerful personal experience of the numinous does, in my mind, serve as some evidence in favor of religious belief, even if it is vastly outweighed by counter evidence from philosophy and science. But if one accepts what one takes to be one's most important convictions entirely on the basis of such evidence, we shouldn't be surprised to find him privileging that same sort of evidence in all cases.

Of course no human enterprise can ever get off the ground without input garnered from personal experience. But the value of science is that it gives us a set of tools for refining that kind of experience. This is why repeatability is vital to the scientific enterprise. If only one person is ever able to perform an experiment, we shouldn't put as much stock in it as if every competent individual who performed it had the same results.

This is why when Harris says that a single well-designed opinion poll of people in Gaza would be of more value than the personal experiences that his opponent continually cites, he's absolutely correct. It can be hard to accept that one's experiences might not be a perfect mirror of reality, but that's exactly why we shouldn't stick our fingers in our ears and pretend that they are, oh yes they are! At least if what we really care about is getting at the truth and not just maintaining our sense of smug self-satisfaction.

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