Abstract
Contemporary societies are awash in rumor. Truth claims may have an uncertain provenance, but we tend to incorporate them into our belief system, act upon them, and recall them through collective memory. The question becomes who, what, where and when do we trust. The analysis of rumor belongs to the sociology of action. This paper sketches a brief analysis of the intersection of trust and rumors through the concepts of plausibility, credibility, frequency, diffusion, boundaries, divisiveness and stability or rumor. The role of the ‘cultures of judgment’ is also outlined