Shem Tov ben Isaac ben Shaprut

Shem-Tob ben Isaac Shaprut of Tudela (שם טוב אבן שפרוט) (born at Tudela in the middle of the 14th century) was a Spanish Jewish philosopher, physician, and polemicist. He is often confused with the physician Shem-Tob ben Isaac of Tortosa, who lived earlier. He may also be confused with another Ibn Shaprut, Hasdai Ibn Shaprut, who corresponded with the king of the Khazars in the 900's.

While still a young man he was compelled to debate in public, on original sin and redemption, with Cardinal Pedro de Luna, afterward Antipope Benedict XIII. This disputation took place in Pamplona, December 26, 1375, in the presence of bishops and learned theologians (see his "Eben Boḥan"; an extract, entitled "Wikkuaḥ" in manuscript, is in the Bibliothèque Nationale, Paris, No. 831).

A devastating war which raged in Navarre between the Castilians and the English obliged Ibn Shaprut, with many others, to leave the country. He settled at Tarazona, in Aragon, where he practised his profession of physician among both Jews and Christians. As a Talmudic scholar he carried on a correspondence with Sheshet.

At Tarazona he completed his Eben Boḥan (May, 1380 or 1385), a polemical work against baptized Jews. As a model and guide for this work, which consists of fourteen chapters, or "gates," and is written in the form of a dialogue, he took the polemical Sefer Milhamot Adonai of Jacob ben Reuben, falsely attributed to David Ḳimḥi. Ibn Shaprut's work, however, is not a partial reproduction of the Milḥamot, as has been incorrectly stated ("Oẓar Neḥmad," ii. 32); it is rather an extension or continuation of it, since it goes into details which are either not mentioned, or are mentioned only briefly, in the other. In the fifteenth chapter, which Ibn Shaprut added later, he criticizes a work written by Alfonso do Valladolid against Jacob ben Reuben. The thirteenth chapter contains a very interesting fragment by a 14th-century Schopenhauer, who wrote under the pseudonym "Lamas" ("Samael"). The Eben Boḥan has been preserved in several manuscripts.

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