Knowledge-Action Principles and Threshold-Impurism

Impurism says that practical factors encroach on knowledge. An important version of impurism is called ‘Threshold-Impurism,’ which the threshold rational credence must pass in order for one to have A prominent kind argument Threshold-Impurism so-called ‘principle-based argument,’ relies a principle fallibilism and knowledge-action principle. This paper offers new challenge against Threshold-Impurism. I attempt show two principles Threshold-Impurists are committed to—KJ Fallibilism—are jointly tension with widely-held that’s ‘Truth-Directedness,’ sense former cannot both apply those who know third. constitutes serious Threshold-Impurists, because it leaves them options, undesirable: denying Truth-Directedness, or accepting Truth-Directedness whether KJ Fallibilism person depends she knows Truth-Directedness.