Gettier Your War On

by John Holbo on August 9, 2007

We might test judgment by asking, on the issue of Iraq, who best anticipated how events turned out. But many of those who correctly anticipated catastrophe did so not by exercising judgment but by indulging in ideology. They opposed the invasion because they believed the president was only after the oil or because they believed America is always and in every situation wrong.

The people who truly showed good judgment on Iraq predicted the consequences that actually ensued but also rightly evaluated the motives that led to the action. They did not necessarily possess more knowledge than the rest of us. They labored, as everyone did, with the same faulty … [ok, enough of that.]

Others have picked on him already, but this Ignatieff fellow, with his ‘yes, they had justified, true belief that the war was a bad idea, but it didn’t amount to knowledge‘ line, is … well. (Alternative post title: when life gives you lemons, make false lemma-ade. Maybe that’s the analytic philosopher in me talking.)

DDT as a repellent

by John Quiggin on August 9, 2007

I got an email today from Phillip Coticelli at Africa Fighting Malaria pointing to a study by Donald Roberts (PDF), showing that DDT has a repellent effect in addition to its toxicity. The key finding is that that three out of five DDT-resistant Aedes aegypti mosquitoes avoid huts sprayed with DDT. Roberts argues that this is a reason for preferring DDT to alternative pesticides such as dieldrin. A few points about this are worth making
* First, it’s good to see AFM acknowledging the fact of pesticide resistance, which primarily accounts for the abandonment of large-scale attempts to eradicate malaria-carrying mosquitoes with pesticides. The libel put out by people like Steven Milloy and AFM founder Roger Bate[1], in which it is suggested that the failure of the eradication program was due to a mythical ban on DDT imposed at the behest of environmentalists, who callously caused millions of deaths, depends critically on ignoring resistance.
* Second, although the study is new, the claim is not. Roberts has been arguing the importance of repellent and irritant effects for a long time. And while the reporting of this study suggests that these benefits are unique to DDT, other work by Roberts has found that permethrin and deltamethrin are just as effective in this respect.

How does this relate to the general debate over the use of hut spraying as a strategy to fight malaria?

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