Abstract :
[en] While such epistemic rules as ‘If you perceive that X, you ought to believe that X ’ and ‘If you have outstanding testimony that X, you ought to believe that X ’ seem to be getting at important truths, it is easy to think of cases in which they come into conflict. To avoid classifying such cases as dilemmas, one can hold either that epistemic rules have built-in unless-clauses listing the circumstances under which they don't apply or, alternatively, that epistemic rules are contributory. This paper explores both responses from a formal perspective, drawing on a simple defeasible logic framework.
Funding text :
This work was supported by the Luxembourg National Research Fund (FNR) through the project DELIGHT (OPEN O20/14776480). I owe a special debt of gratitude to Fabrizio Cariani, John Horty, Thomas Icard, and Benjamin Kiesewetter – all of whom supported this project in different ways – as well as an anonymous referee of this journal whose insightful comments have led to several important improvements.
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