Robin Kestrel - 2010-04-05
Novella responds "I will ignore the bulk of Benneth’s personal libel – suffice to say it is beneath contempt. He does make an attempt at an evidence-based argument, but he completely botches it. He argues that there are many studies showing an effect for homeopathic remedies on plants, animals, and cells in culture. This, he argues, rules out the placebo effect.
This is both wrong and misleading. First, Benneth mischaracterizes the scientific argument as – because homeopathy cannot work any study showing an effect is due either to the placebo effect, fraud, or incompetence. I would add bias and chance, but further this is an oversimplification of the scientific position – the conclusion that homeopathy does not work is based both on the lack of plausibility and the poor quality and overall negative nature of the empirical evidence.
Benneth then makes a patently illogical argument – that because the placebo effect is ruled out (false premise) that the critics of homeopathy are wrong. But what about fraud (as with Jacques Benveniste’s lab), incompetence, bias, and chance? This is why we do not cherry pick, but look for a pattern of reproducibility – something which is lacking with homeopathy.
Let us also look further at the placebo claim – this is one I frequently hear. This is a simplistic misconception about the placebo effect, that it is entirely a mind-over-matter result of expectation. In fact, as it is operationally defined in medical trials, placebo effects can include anything other than a physiological response to the treatment, including observer expectation. Someone has to be observing the plants, cells, or animals and their bias counts too.
And, after reviewing the published studies, I do not accept the premise that the evidence supports the efficacy of homeopathy in treating plants. The literature shows mostly small and uncontrolled studies – no solid reproducible effects. Certainly nothing that would justify rewriting the physics textbooks."
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