A detailed analysis is performed of a paper in which H. E. Stokinger, for many years the president of the American Conference of Governmental Industrial Hygienist's Threshold Limit Values Committee, purports to show that eight specified chemical carcinogens have thresholds. For seven of the eight substances, his sources do not at all support his conclusions, and in some of these cases they even support the opposite conclusion. Even in the remaining case, bis(chloromethyl)ether, the results that he refers to are compatible not only with a threshold but also with various non-linear non-threshold models. Stokinger's paper satisfies classical criteria of pseudo-science, such as the misrepresentation of data, incorrect statistics, reliance on anecdotal evidence, the use of scientific references in support of claims that they do not at all substantiate, and the uncritical acceptance of information coming from sources known to be fraudulent.
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