Abstract
This paper describes the pragmatic-rhetoric functions of visual perception verbs used as evidentials in scientific articles. These verbs not only indicate different types of evidentiality (visual and inferential), but can also adopt forms that suggest the (non)shared status of evidence. Our aim is to discover if there exists any constant relationship between the type of evidentiality, accessibility and the functions these evidential constructions have in the discourse. This study was carried out in a corpus of Biology articles published between 1799 and 1920. We believe that, in this corpus, many evidential choices are conditioned more by the author’s intentions than by the conventions of the genre. It should be reminded that in the period under study the conventions of scientific writing were yet to be established.
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