Animal cross-fostering, race and IQ, and the deductivist’s fallacy

I wish to coin a fallacy I’ve seen a number of times, exemplified in this paper: Kempthorne, O. (1978). A BIOMETRICS INVITED PAPER: Logical, epistemological and statistical aspects of nature-nurture data interpretation. Biometrics, 1-23. Abstract: In this paper the nature of the reasoning processes applied to the nature-nurture question is discussed in general and with…

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Two very annoying statistical fallacies with p-values

Some time ago, I wrote on Reddit: There are two errors that I see quite frequently: Conclude from the fact that a statistically significant difference was found to that a significant socially, scientifically or otherwise difference was found. The reason this won’t work is that any minute difference will be stat.sig. if N is large…

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The modal fallacy

This is a translation of my earlier article on the subject. Link. The modal fallacy By Emil Kirkegaard, Deleet.dk This fallacy is rather common among persons who are not well versed in logic (especially modal logic). Consider these two not logically identical sentences: I) If there exists at least one subject S that knows which…

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