This special issue grew out of a small conference The Known & the Unknown: Exploring Twelfth-Century Philosophy, which was funded by the Carlsberg Foundation, hosted by the Saxo Institute, and held at the University of Copenhagen in April 2018. Its central topic was the many, mostly unexplored, commentaries on Aristotle, Boethius, and Porphyry that constitute the key textual evidence for a fascinating phenomenon that, although it played a pivotal role in the philosophical revival of Western Europe, remains frustratingly underexplored to (...) this day: the logical schools of the twelfth century. The present introduction has two parts. In the first part, John Marenbon lays out the background to this special issue of Vivarium as a whole, explaining both what the philosophical project pursued by twelfth-century logicians was and how, and how far, the historical project of understanding it has progressed over the last two hundred years. In the second part, Heine Hansen briefly presents the issue and its contents. (shrink)

_ Source: _Volume 53, Issue 2-4, pp 249 - 268 The tract on logic that has now become known as the _Introductiones Montanae maiores_ provides us with useful evidence of the kind of education that was on offer in the Parisian schools of the 12th century. In this contribution, I will go through a number of arguments brought up in connection with the definitions of basic logical concepts. By doing so I aim to provide more details about some of the (...) most important theoretical positions of the tract. (shrink)

This article concerns existents as a contentious issue in contemporary Abelardian scholarship. More precisely, it concerns the ontological standing of forms in Abelard’s metaphysics. Take, for example, the apple on my desk. What ontological standing does its redness have? Is it an actual entity over and above the apple or is it in some sense “reducible” to it? Abelard, famously, was a nominalist, so the question is not about some purported universal redness. Rather, it is about the particular redness of (...) the particular apple on my desk. The issue is contentious in that the best current accounts of Abelard’s metaphysics disagree strongly about how to answer this question. Here, rather than focusing on Abelard’s own writings – which so far have yielded no definitive answer – I will consider some anonymously transmitted and mainly unedited logical texts from the twelfth century and show how his contemporaries understood Abelard’s view and how the followers of his philosophical nemesis, Alberic of Paris, reacted to it. (shrink)