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Rationality: From AI to Zombies

Explaining vs. Explaining Away

10 Mar 2015

Transcription

Full Episode

0.807 - 26.649 Eliezer Yudkowsky

Explaining, verse explaining away. John Keats' Lamia, 1819, surely deserves some kind of award for most famously annoying poetry. Do not all charms fly at the mere touch of cold philosophy? There was an awful rainbow once in heaven. We know her woof, her texture, she is given.

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27.29 - 54.535 Eliezer Yudkowsky

In the dull catalogue of common things, philosophy will clip an angel's wings, conquer all mysteries by rule and line, empty the haunted air and gnomed mind. Unweave a rainbow. My usual reply ends with the phrase, if we cannot learn to take joy in the merely real, our lives will be empty indeed. I shall expand on that tomorrow. Today I have a different point in mind.

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55.056 - 82.98 Eliezer Yudkowsky

Let's just take the lines, empty the haunted air and gnomed mine, unweave a rainbow. Apparently, the mere touch of cold philosophy, that is, the truth, has destroyed haunts in the air, gnomes in the mine, rainbows. which calls to mind a rather different bit of verse. One of these things is not like the others. One of these things doesn't belong.

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83.841 - 102.145 Eliezer Yudkowsky

The air has been emptied of its haunts and the mind de-gnomed, but the rainbow is still there. In writing a wrong question, I wrote, tracing back the chain of causality step by step, I discover that my belief that I'm wearing socks is fully explained by the fact that I'm wearing socks.

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102.445 - 125.162 Eliezer Yudkowsky

On the other hand, if I see a mirage of a lake in the desert, the correct causal explanation of my vision does not involve the fact of any actual lake in the desert. In this case, my belief in the lake is not just explained, but explained away. The rainbow was explained. The haunts in the air and gnomes in the mine were explained away.

126.024 - 147.317 Eliezer Yudkowsky

I think this is the key distinction that anti-reductionists don't get about reductionism. You can see this failure to get the distinction in the classic objection to reductionism. If reductionism is correct, then even your belief in reductionism is just the mere result of the motion of molecules. Why should I listen to anything you say?

148.338 - 169.459 Eliezer Yudkowsky

The key word in the above is mere, a word which implies that accepting reductionism would explain away all the reasoning processes leading up to my acceptance of reductionism the way that an optical illusion is explained away. But you can explain how a cognitive process works without it being mere.

169.591 - 188.57 Eliezer Yudkowsky

My belief that I'm wearing socks is a mere result of my visual cortex reconstructing nerve impulses sent from my retina, which received photons reflected off my socks. Which is to say, according to scientific reductionism, My belief that I'm wearing socks is a mere result of the fact that I'm wearing socks.

189.572 - 214.131 Eliezer Yudkowsky

What could be going on in the anti-reductionists' minds such that they would put rainbows and belief in reductionism in the same category as haunts and gnomes? Several things are going on simultaneously. But for now, let's focus on the basic idea introduced yesterday— the mind projection fallacy between a multi-level map and a mono-level territory.

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