In sociohistorical inquiry, no epistemology prevails as a widely accepted account of knowledge. Positivism yet retains its defenders. As alternatives, both structuralist and hermeneutic challenges to science are undermined as foundations of knowledge by their own accounts, yielding the postmodern loss of certitude. Conventionalism, rationalism, and realism have been proposed as “local epistemologies” under the new conditions, and on a broader level, pragmatic and transcendental theories of communication substitute for epistemology classically conceived. As yet, these contending developments do not resolve the crisis of sociohistorical knowledge.