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The first study to assess directly the risk of cancer after CT scans in childhood found a clear dose-response relationship for both leukemia and brain tumors: risk increased with increasing cumulative radiation dose. For a cumulative dose of between 50 and 60 milligray or mGy (mGy is a unit of estimated absorbed dose…
Measurement has too often been the leitmotif of many investigations rather than the experimental examination of hypotheses. Mounds of data are collected, which are statistically decorous and methodologically unimpeachable, but conclusions are often trivial and rarely useful in decision making. This results from an…
Investigators are commonly said to be engaged in a search for the truth. I think they themselves would usually state their aims less pretentiously. What the experimenter is really trying to do is to learn whether facts can be established which will be recognized as facts by others and which will support some theory…
36. When, under stress of pain, the witch has confessed, her plight is indescribable. Not only cannot she escape herself, but she is also compelled to accuse others whom she does not know, whose names are frequently put into her mouth by the investigators or suggested by the executioner, or of whom she has heard as…
A series called 'The X Files', which pays lip-service to sceptical examination of the paranormal, is skewed heavily towards the reality of alien abductions, strange powers and government complicity in covering up just about everything interesting. Almost never does the paranormal claim turn out to be a hoax or a…