The philosophical ideas of Theodore Prodromos, the famous Byzantine intellectual of the 12th century, are conveyed in his three works on the Aristotelian logic interpreted in terms of Platonic philosophy. One of them is the dialogue Xenedemos, or Voices (Ξενέδημος Φωναί), written in the Platonic dialogical tradition and dealing with Porphyry’s five predicabilia. In a brief introduction to the publication of a Russian translation of the dialogue, a number of parallels, allusions and references to Platonic philosophy revealed in Prodromos are commented upon: the reflection on the unity of existing things; their division into categories or genera; their reduction to universals; paradoxes and contradictions inevitably arising if one employs predicabilia to analyze the definition as such; the Platonic dialogue as a genre of reasoning; the elenctic method, the irony and the hunt for definitions; the Socratic method of setting up questions. Here we introduce the first Russian translation of the Xenedemos by Dmitry C