Alvin Plantinga wrote a probabilistic critique of historical arguments for the kernel of Christianity. It is based on the fact that, generally, the more complex a conjunction, the lower its probability. The paper provides elementary insights into the epistemology of Plantinga, probability calculus, and the role of this calculus in contemporary epistemology. It introduces a concept of a good argument, explains in which sense and why, according to Plantinga, no good arguments for Christianity exist, and discusses the following replies. The probability that every argument for Christianity fails can be low. Even if Christianity is less probable than its proper propositional parts, it can be still be probable, whether on the same or on some enhanced body of evidence. Finally, there have been detailed probabilistic arguments for Christianity yielding results significantly different from Plantinga’s cursory estimates.

Aristotle’s notion of substance presents various problems of interpretation. Many interpreters focus mainly at the notion of primary substance, especially with regard to the difference between how Aristotle defines it in Metaphysics VII and in the Categories. The present study aims at confirming mutual compatibility of these texts and touches also the problem of knowability of the primary substance. Translation: Lukáš Novák

The article offers a critical biography, description and characteristic of method, fonts and doctrine of Master Paul of Soncino († 5 August 1495), friar of the Dominican Order, in particular his Acutissimae Quaestiones Metaphysicales. The life and work of this philosopher falls within the ambit of Italian Thomism of the 15th century. Between his masters we commemorate Peter Maldura of Bergamo and Dominic of Flanders. His exposition of Aristotle’s Metaphysic proceeds from a peculiar synthesis of Arabic Commentator Averroes and Thomas Aquinas. Soncinas’ work and position was frequently discussed up to the 15th century.

Two kinds of individuals are distinguished: abstract and concrete. Whereas abstract individuals belong to our conceptual sphere, concrete individuals (i.e. particulars) individuate the world of matter. A subject inquiring the external world projects abstract individuals onto the concrete ones (i.e. pieces of matter). Our theory offers a solution to various ontological and epistemological puzzles concerned with individuals, e.g., the Ship of Theseus, Polish Logician, problems with reidentification, or proper names.