The conceptual antinomy that aesthetics has used since the early developments of its discourse has entailed a permanent polarity and effect of opposition within its main categories: beautiful/ugly, clear/obscure, distinct/confused. Although the terms have remained, the movements of survival, mutation and conceptual obsolescence have characterized this paradigm that spans from the times of Plato to the establishment of the aesthetic discipline in the 78th century by A. Baumgarten. In this study, I propose to identify and describe certain features that have been inherited from this foundational principle of aesthetic judgment, which has stemmed from a real terminological war. Furthermore, I propose to identify and describe the played by the model of oppositions in the experience of sensitive knowledge, as Baumgarten defines Aesthetics, and the consequences that it has for the criteria of aesthetic judgment.