 Medieval Skepticism was not a movement. Rather, it was a series of (sometimes isolated) worries and responses to such skeptical problems as those outlined above. While some impetus for later discussions was gained from classical skeptical sources, for the most part medieval skepticism took its own path. Among the distinctly medieval additions to the debate were an emphasis on the certainty of self-knowledge, and especially on a widespread recognition across traditions that God’s omnipotence, and thus the possibility of Divine deceit on these grounds, provides a special challenge to the epistemology of anyone who holds a theistic worldview.