 Interestingly, as Dummett (1975) remarks himself, his theory of meaning is far apart from Brouwer’s ideas on mathematics as an essentially languageless activity. So that there are at least two quite different lines of thought that lead to the adoption of intuitionistic logic over classical logic, the one developed by Brouwer and the one argued for by Dummett. Dummett’s work on Intuitionism has been commented on by various philosophers such as Dag Prawitz (1977), Parsons (1986) and Richard Tieszen (1994 en 2000). 