%0 Journal Article %T Questions of Logic, Philosophy, and Linguistics %A Marcio Chaves-Tann¨˛s %J Principia : an International Journal of Epistemology %D 2011 %I Universidade Federal de Santa Catarina, Brasil %X There were in the past, just as there are in the present, several diverse attempts to establish a unique theory capable of identifying in all natural languages a similar, invariable basic structure of a logical nature. If such a theory exists, then there must be principles that rule the functioning of these languages and they must have a logical origin. Based on a work by the French linguist, Oswald Ducrot, entitled DĄŻun mauvais usage de la logique, this paper aims to present in a concise manner two of the above mentioned attempts. They were elaborated in diverse epochs and different arguments were put forward to support them. The first attempt was in XVII century France and its theoretic basis was the renowned ĄŽPort-Royal LogicĄŻ. The second attempt is recent and its theoretic support comes from Contemporary Logic. %K Logic %K philosophy %K linguistics %U http://www.periodicos.ufsc.br/index.php/principia/article/view/1808-1711.2011v15n1p111/20557