ÒCreaseÕs brilliantly exploited theatrical analogy places scientific theorizing back into the wider context of experimental inquiry. . . . His is a genuinely original voice among those post-positivist philosophers of science whose star is clearly rising.Ó ÑRobert C. ScharffAttacking positivist and Kantian varieties of philosophy of science in which experimentation takes a backseat to theory, Robert P. Crease develops his conception of the centrality of experimentation via an argumentative analogy with theatrical performances. To establish his program, Crease draws on three nonpositivist strands of recent philosophy: HusserlÕs phenomenology to clarify the notion of invariance, DeweyÕs pragmatism to make needed revisions in our idea of productive inquiry, and HeideggerÕs hermeneutics to formulate a concept of interpretation appropriate to the cultural and historical ÒlifeworldÓ in which members of a scientific community think and act.