A Defense of Philosophy (against Paul Graham)

1) A "small" sample is often sufficient reason to accept a statement. If I tell you that there exists a Turing machine that can solve SAT in polynomial time, all I have to do to prove it is supply one (incidentally, if you have one lying around, let me know :P ). If I tell you that ALL of something is bad, then I have an uphill battle. But if I tell you SOME of something is bad, I only have to provide a single example to be right.

Also, you may want to read PG's essay on essays (www.paulgraham.com/essay.html); his goal in writing an essay isn't to explicate every detail of a subject, it's to work through a subject to understand it--it is only tangentially that any other audience is involved. That I am convinced of the rough truth of his arguments is not solely based on what he has written, and he does not have to personally supply me with every bit of evidence to be right (although doing so would certainly make it easier for the reader).

2) I would not question the fact that Greek philosophers influenced the development of mathematics, and I expect PG would not do so, either (particularly since the Greek philosophers were typically also mathematicians, but even without that, it would seem an impossible claim to the contrary). A claim I have made, however, is that the things that the Greek philosophers wrote that could not now be seen as important in some other field currently extant, or in cognitive science--which ought to be thought of as its own field (although in many places it isn't yet)--were not themselves important to the development of mathematics or any other field. These aspects of their writing, when studied, critiqued, and emulated in modern times, are the only topic of concern to PG in his essay, or myself in this particular discussion.

3) This is a fundamental problem. Just because we disagree certainly does not make one of us right, and the only reason that at least one of us is guaranteed to be wrong about something here is because I just asserted that we disagree. An equally fundamental problem is your assumption that either PG or myself is talking about all of philosophy.

With regard to "strange" ideas, every field has had strange ideas when looking in hindsight. The fields for which those ideas are still in contention for validity are the ones with the greatest problem of lack of substance, in proportion with how many such ideas there are, and how "strange" they are (where by strange I do not mean counterintuitive, but rather running against other existing evidence).

4) Relatively little thinking. We got a lot better at it when we didn't have to spend most of our time hunting and gathering. The course of human history has been the process of freeing up more time to spend thinking; at this point, we've freed up so much that we tend to use most of it in ways we typically later label as non-productive.

You say you can do this for all fields. Can you point to some bad math for me? That you would have much greater difficulty doing this than PG or I would have for finding bad philosophy is precisely PG's point.

Is there some other form of argument that could possibly exist to support his claim other than personal experience and selected examples? I'm not sure what kind of evidence you would like to see in PG's essay, but feel it lacks. The subject matter does not lend itself to effective experimental testing, and the claim is not mathematical in nature.

PG's, and my, problem, is that modern philosophers still rarely identify the fact that the bad thinking is bad. Understanding the utility of (and the utility of understanding) effective but civil critical debate remains unquestioned. The subject matter of these debates is what is under fire here, precisely because it is typically pervaded by faulty reasoning. Even if you want to use previous bad reasoning to learn why some reasoning is bad, this doesn't mean you need to continually create more examples of bad reasoning; surely those that already exist suffice.

Well, we seem to agree on some issues: Not all philosophy is bad or useless. Some might be. So, let's say "Some philosophy is useless." PG presents a few quotes and we may conclude, he proved his point.

But did he present any useless philosophy or just badly written philosophy? Or does it just appear to be useless because we don't immediately understand it?

The latter case basically boilds down to an argument from ignorance: "We don't understand some philosophers, therefore they must be useless (or bad or false)." Many people don't understand much of contemporary maths either, but that's hardly a good reason to call it useless (or bad or false). In contrast to maths, though, many people assume to be able to understand it.

The former case is also hardly a good reason to call something useless. Kant, for instance, is bloody complicated to read (at least, for me, and I'm German). However, his arguments still make sense -- one just needs to read the literature that explains Kant's ethics and meta-physics in a more accessible manner. They were also quite useful for other philosophers.

You say you can find bad philosophy more easily than I can find bad maths. Maybe, but since this is basically an empirical question, our small sample won't be sufficient to prove anything. On a side note: It's easy to find useless maths -- in the sense of published proofs that turned out to be wrong. Since they didn't prove anything, why have they been published, at all? For examples, look at the history to prove Fermat's Last Theorem. Quite a lot of them failed or were simply wrong. What a waste of time.

However, your test to find useless philosophy also suffers from the lack of a proper definition of "useless" and "useful". Just because you can't think of any use, doens't mean you're right -- this is just another argument from ignorance.

Let's consider ethics, for instance: It is basically useless concerning empiricial results. However, it's still useful in many contemporary discussions; for instance, animal's rights, abortion, women rights, death penalty, justice, atheism, and many other issues.

Concerning your question whether some other form of argument could possibly exist to support PG's claim? Sure, from an empirical point of view: A proper definition of "useless" and a proper random sample concerning philosophical works. This would at least support the conclusion that, say, 35% of philosophy turned out to be useless.

But PG made two additional arguments:

(1) Any resulting number of useless philosophy is due to the current philosophical method that is motivated by studying the most abstract problems.

(2) A different method that starts from studying practical problems and builds up to abstract problems will result in a smaller number of useless philosophy.

To support (2), an argument from analogy would help: Study a model of the proposed method (thankfully provided by science) and establish the empirical fact that is produced a smaller percentage of useless results.

Of course, this can easily be refuted by attacking the analogy. The methods of empricial science simply doesn't translate well to issues philosophers care about; such as ethics.

To support (1), one would need to start from the premise of the current method and deduce that it will lead to a certain number of useless philosophy and that there is no other possible explanantion. I doubt that it can be done, but I may be wrong.

Just to present a counter-example: to establish the habit of presenting arguments in a more formal way could help to distiguish good and bad philosophy much easier.

However, the point is that PG -- although his intention is apperently to "work through a subject to understand it" -- fails badly. He hardly worked though and he probably still doesn't understand it. Maybe, if he would have studied philosophy more carefully he could have made better arguments for his case.

Which shows how careful one should be about certain words: From a philosophical point of view, namely, PG's work was useless, indeed.

Ah. That would have been the easy way. I figured it out because xlnt stopped commenting on the same day that qqq started.

Edit: Besides, there can't be that many people who go on about Godwin, Burke, and Feynman.

How can you possibly refute his argument intellectually without working towards a solution in some way? Knowing that it's not true now is an improvement to what was known then. By philosophizing against it, you gain a more concrete understanding of the problem and are, subsequently, closer to providing a solution.

There should be :(