Аннотация:This study, based on a corpus analysis of 300 uses of the connector 'to est’' in Russian (Eng. 'that is', Lat. 'id est'), focuses on pragmatic aspects of reformulation as one type of logico-semantic relations. Being an efficient discursive instrument, which allows the speaker to stop syntagmatic structuring of discourse in order to restate a “failed” text fragment in a more optimal way, reformulation can be of two types: local (micro-syntactic) and large-scale (macro-syntactic). If micro-syntactic reformulation consists in replacing one dependent grammatical constituent with another, macro-syntactic reformulation involves two or more grammatically independent clauses. Following the theoretical framework of the Groupe de Fribourg (2012), the article highlights the pragma-syntactic mechanisms of two types of reformulation and their relationship with some cognitive operations involved in discourse processing. Key words: reformulation; pragmatics; micro-syntax; macro-syntax; logico-semantic relations; semantics; discourse processing.