Unnamed comments on The noncentral fallacy - the worst argument in the world? - Less Wrong

157 Post author: Yvain 27 August 2012 03:36AM

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Comment author: Emile 27 August 2012 11:40:03AM 14 points [-]

And okay, a tiny fraction of the time people are just trying to use words as a Schelling fence.

I'm not sure it's that tiny, especially once you're using the "steel man" version of the arguments; i.e. things like "Schelling fences" do not often appear in the reasons given for the disagreement, but that can still be what it boils down to.

People who object to abortion may be objecting to a weakening of the social stigma against the murder of innocents - that social stigma performs a useful function in society, so allowing anything that could be described as "murder of innocents" is perceived as bad, regardless of whether that thing is in itself bad.

In other words, even if words are hidden inferences with leaky generalizations etc. - social norms are still defined in terms of words, and so "pointless" debates over definitions still have their place in discussions of morality. Questions that shouldn't be morally relevant ("is abortion murder?") become so because of the instrumental value of social norms.

So yes, sometimes pulling out a dictionary in the middle of a moral argument may be justified. The discussion can then turn to something more useful, like "is it worse if the norm against murder is slightly weakened, or if women have to keep children they don't want?".

Comment author: Unnamed 28 August 2012 09:32:37AM 3 points [-]

The "a fetus is a person" attempt to frame the abortion debate actually seems like it would weaken the norm against killing innocents. Most people agree with the rule that it's generally wrong to kill an innocent person, which is a relatively clear bright-line rule. If pro-abortion people can just say "well, a human fetus doesn't count as a person so the rule doesn't apply there" then the rule against killing a person remains relatively clear and simple for them. But if they have to count a human fetus as a "person" then the rule against killing a person becomes messy and complicated for them - they have to say "well, it's often wrong to kill a person, but there are various exceptions and factors to weigh."

Anti-abortion people might like having the abortion debate take place on those grounds, with a human fetus counting as a "person" by definition, because of the rhetorical advantage it gives them within that particular debate. But for the broader goal of establishing shared support for the "sanctity of life" it is counterproductive to cast the abortion debate in those terms. If you use a dictionary to remove the flexibility/disagreement in defining the domain where the rule applies, then that flexibility/disagreement gets shifted into the content of the rule.

Comment author: evand 28 August 2012 02:23:40PM 0 points [-]

It might be worth noting that abortion proponents cluster with death penalty supporters, gun ownership advocates, and generally have a poor record on human rights for e.g. GLBT people. I'm not convinced that they hold the sanctity of life to be equally important for all people generally.

One person's modus ponens is another's modus tollens.

Comment author: Decius 28 August 2012 09:58:11PM 0 points [-]

It would be if it were true.

Those three groups do not tend to cluster, nor do they have the record on human rights that you ascribe to them.

Comment author: mantis 13 September 2012 09:05:58PM 1 point [-]

I think it's pretty obvious that evand mean "abortion opponents," not "abortion proponents." Make that correction and the rest of the comment is accurate.

Comment author: Emile 28 August 2012 09:59:24AM 0 points [-]

Abortion was probably not the best example, "racism is wrong" is a clearer norm that depends on words. I agree with you, as I said later on:

Schelling fences probably play a bigger role for "justifiable killing" (like self-defense, the death penalty, euthanasia), where having a strong norm against killing in general discourages revenge killings (anti-abortion seem to be trying to hijack that norm to cover a case that doesn't fall under "killing" nearly as naturally).

For racism, you get the same problem you mention, with people trying to add more things under the "racist" umbrella (such as affirmative action, or opposition to affirmative action), at the risk of weakening the norm.