If we consider how theoretical operations belonging to the methodological inventory of linguistics are carried out (i. e. the way linguistic theories are set up), three main criteria suggest themselves for classifying them: (1) Both, nature and type of the aims of the scientific knowledge applied which allow to specify the epistemological interests as well as the theoretical impact constituting the purpose of linguistic operations; (2) the nature of the intellectual procedures in connection with which a set of intersubjectively acceptable operations should guarantee that current postulates of the theory of science be maintained; (3) the set of data serving as an empirical basis for the theories to be estab­ lished on the one hand and as a correlate for the further development, the testing and the evaluation of theories on the other hand. It is to be considered a basic concept (as well as a motive) of current text­ linguistic research that due to the linguistic analysis of discourses a further development of linguistics has set in or is still to be achieved as regards the three criteria mentioned above. Therefore, if we want to estimate text-linguistic approaches (or concepts), works (methods), or knowledge (results) we should take the view allowing for the general valuation of the linguistic discipline or one of its sub-disciplines. This should be done with respect to the contributions gathered in this volume as well.

Overview.- Text Grammar and Text Logic.- 1. Introduction.- 2. The Hypothetic Form of Text Grammar.- 3. Formal Logic and Natural Logic.- 4. Text Logic.- 5. Summary.- On Various Solutions of the Problem of Presuppositions.- Pragmatic Implication.- 1. Elements of a Pragmatic Language.- 2. Truth Conditions for Formulas with Series of Epistemic Operators with Alternating Subscripts.- 3. Pragmatic Implication.- 4. Other Types of Pragmatic Implications.- 5. Summary.- Time and Text: Towards an Adequate Heuristics.- 1. Preliminaries.- 2. Note on the 'Meta-Theoretical Paradigm'.- 3. Brief Sketch of a Model of Language Functioning.- 4. Time and Text.- 5. Concluding Remarks.- Towards an Empirically Motivated Grammatical Theory of Verbal Texts.- I. Sentence Grammars and Text Grammars.- II. A 'Not Fixed Linearity Text Grammar'. The Present Stage of its Development.- Sentence Grammar, Text Grammar, and the Evaluation Problem. Some Remarks Concerning the Theoretical Foundation and the Possible Application of Text Grammars.- 1. Some Remarks on the Meta-Theoretical Postulates and Conventions to Be Used.- 2. Some Informal Remarks on the Structure of $${G_{{d_i}}}$$, i.e. the Phrase Structure Grammar (PSG) to Be Used.- 3. Specification of the Categories Used.- 4. A Sentence Grammar$${G_{{d_i}}}$$Generating a Set of Sentences (a Language Ldoof which the Sentence SAT[IMP](1)11 is an element.- 5. Some Arguments for the Delimitation of a Sub-Grammarj$${G_{{d_i}}}$$Based on Syntax and Semantics, i.e. a Grammar Enumerating only Sentences (Norms, Directives) Belonging to the German Language of Jurisdiction.- 6. On the Derivation of Synonymous and Hyperonymous Sentences by Grammars of the Typej$${G_{{d_i}}}$$.- 7. Some Remarks on the Evaluation ofj$${G_{{d_i}}}$$.- On the Validation ofText-Grammars in the 'Study of Literature'.- Abstract.- 0. Preface.- 1. The Validation of Text-Grammars in the Study of Literature.- 2. The Empirical Content of the Study of Literature.- 3. Reconstruction of the Text Concept.