Recent philosophical treatment of conspiracy theories supposes them all to be explanatory, thus overlooking those conspiracy theories whose major purpose is the assertion of ‘hidden facts’ rather than explanation of accepted facts. I call this variety of non-explanatory conspiracy theories “counterfact theories”. In this paper, through the use of examples, including the Obama birth certificate conspiracy theory, I uncover the distinctive reasoning pattern and dialectical strategy of counterfact theories, highlighting their epistemic flaws.

Although epistemic values have become widely accepted as part of scientific reasoning, non-epistemic values have been largely relegated to the "external" parts of science (the selection of hypotheses, restrictions on methodologies, and the use of scientific technologies). I argue that because of inductive risk, or the risk of error, non-epistemic values are required in science wherever non-epistemic consequences of error should be considered. I use examples from dioxin studies to illustrate how non-epistemic consequences of error can and should be considered (...) in the internal stages of science: choice of methodology, characterization of data, and interpretation of results. (shrink)