Abstract

This paper seeks to bring together two trends in contemporary phenomenological research: an investigation of the sciences and a re-exam­ination of Martin Heidegger’s understanding of logic and inference. I will do so by examining the foundations of the “just-as” truth found in the sciences, finding that scientific truth claims rest on apophantic speech, the contextual nature of disclosure, and, ultimately, the as-structure of Dasein. This leads to the implication that the laws of inference for the sciences are based on how beings show themselves within a science rather than preceding the sciences. I will finish by showing that this implies logical and scientific pluralism and the rejection of philosophical naturalism.