Martin Chekhovich was particularly zealous in holding theological disputations, both in Lublin and in other cities, "with genuine as well as pseudo-Jews." The results of these disputations are embodied in several chapters of his books entitled "Christian Dialogues" (1575) and "Catechism" (1580). One of his Jewish opponents, Jacob (Nahman) of Belzhytz,[117] found it necessary to answer him in public in a little book written in the Polish language (_Odpis na dyalogi Czechowicza_, "Retort to the Dialogues of Chekhovich," 1581). Jacob of Belzhytz defends the simple dogmas of Judaism, and accuses his antagonists of desiring to arouse hostility to the Jewish people. The following observation of Jacob is interesting as showing the methods of disputation then in vogue: It often happens that a Christian puts a question to me from Holy Writ, to which I reply also from Holy Writ, and I try to argue it properly. But suddenly he will pick out another passage [from the Bible], saying: "How do you understand this?" and thus he does not finish the first question, on which it would be necessary to dwell longer. This is exactly what happens when the hunter's dogs are hounding the rabbit which flees from the road into a by-path, and, while the dogs are trying to catch it, slips away into the bushes. For this reason the Jew too has to interrupt the Christian in the midst of his speech, lest the latter escape like the rabbit as soon as he has finished speaking. Chekhovich replied to Jacob's pamphlet in print in the same year. While defending his "Dialogues," he criticized the errors of the Talmud, and made sport of several Jewish customs, such as the use of _tefillin_, _mezuza_, and _tzitzith_. A serious retort to the Christian theologians came from Isaac Troki, a cultured Karaite,[118] who died in 1594. He argued with Catholics, Lutherans, and Arians in Poland, not as a dilettante, but as a profound student of the Gospels and of Christian theology. About 1593 he wrote his remarkable apologetic treatise under the title _Hizzuk Emuna_ ("Fortification of the Faith"). In the first part of his book, the author defends Judaism against the attacks of the Christian theologians, while in the second he takes the offensive and criticizes the teachings of the Church. He detects a whole series of contradictions in the texts of the Synoptic Gospels, pointing out the radical deviations of the New Testament from the Old and the departure of the later dogmatism of the Church from the New Testament itself. With calmness and assurance he proves the logical and historical impossibility of the interpretations of the well-known Biblical prophecies which serve as the substructure of the Christian dogma.