John of Jandun, also known as Jean de Jandun and Johannes de Janduno, was foremost among the Averroists at Paris in the fourteenth century. He was born in the village of Jandun in the French province of Champagne. The estimate of his date of birth is based on the year 1310, the earliest date found on any writing definitely attributable to him; at the time of this first or very early publication, John would have been a recent master of arts, and reckoning by the age and curricular requirements in effect at the University of Paris in the early fourteenth century, he could not have been much more than twenty-four years of age. John was active throughout the next decade and a half as master of arts at the Collège de Navarre, in Paris, although he was nominally...