Sistema lógico-semântico de expansão na reescrita de textos acadêmicos: escolhas linguísticas de uma estudante versus as escolhas do ChatGPT [Logical-Semantic Expansion System in the Rewriting of Academic Texts: Linguistic Choices of a Student versus the Choices of ChatGPT]

This study addresses the linguistic choices present in the rewriting of texts produced by novice learners in an academic context and by the ChatGPT tool. The objective is to analyze these linguistic choices based on the logical-semantic expansion system (HALLIDAY; MATTHIESSEN, 2004; 2014) present in rewritten versions of the same text. Qualitative and interpretative in nature, the corpus consists of the writing and rewriting of a first-semester undergraduate student and three versions produced by ChatGPT, aimed at comparing these occurrences. The analysis focuses on the nature of the changes in the complex sentences of all the rewritten versions, seeking to understand which changes in the logical-semantic system are recurring. The results show that expansion by intensification is prioritized by ChatGPT through the addition of modifiers, which differs from the student's choices. ChatGPT follows a pattern, starting with extended paratactic clauses (1^+2) and continuing with elaborated hypotactic complex clauses (α^=β). ChatGPT offers different responses depending on the given command, in an attempt to resemble the rewriting, but shows difficulty in producing following extensive instructions and recognizing variables contained in the feedback. The contribution relates to understanding how ChatGPT reads the instructions provided to rewrite a text.