Sentences in the language of reasoning

In the present paper we investigate a few grammatical aspects of texts in which a reasoning has been expressed. We are mainly interested in text units (called sentences) that are constituent parts of a reasoning. Firstly we discuss the full conceptual framework reflected in the reasoning: its under lying form. Next we divide sentences into two main classes: fundamental and informative sentences. Each of these main classes will thereupon be subdivided. In classifying we are guided by the manner in which sentences function in a reasoning. The nature of each class is elucidated by a discussion and examples. We subsequently deal with compound sentences and sentence groups. Finally we analyse two texts according to the grammatical classification principles explained in the paper.