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Atocha Aliseda


In this paper I address the question of the dynamics of empirical progress, both in theory evaluation and in theory improvement. I meet the challenge laid down by Theo Kuipers in Kuipers (1999), namely to operationalize the task of “instrumentalist abduction,” that is, theory revision aiming at empirical progress. I offer a reformulation of Kuipers’ account of empirical progress in the framework of (extended) semantic tableaux and show that this is indeed an appealing method by which to account for some specific kind of empirical progress, that of lacunae.