_ Source: _Volume 53, Issue 2-4, pp 294 - 321 Manuscript London, British Library, Burney 330 contains an anonymous collection of grammatical sophisms, dating in all probability from early 13th-century France or England, and all based on problematic biblical, liturgical or religious propositions. After a presentation of the manuscript and collection, this article examines two analysis tools that are applied in the majority of the sophisms, viz. a distinction between three layers of grammatico-semantic perfection or completeness, and the grammatical and (...) semantic supposition doctrines. It appears that these sophisms pay prominent attention to improper or figurative supposition, but are not intended for highly advanced readers. These preliminary results suggest that the Burney Sophismata Collection constituted an exercise tool to support textbook-based instruction in theological grammar, which was developed by such masters as Peter the Chanter and William de Montibus in the late 12th and early 13th centuries. (shrink)