 This is a watershed moment: the Farabian tradition continued its work on the Aristotelian texts, though ever more defensively and reactively to challenges posed by Avicenna. The Avicennan tradition by contrast simply ignored the Aristotelian texts. The Farabian tradition shrank away so quickly that even by the late twelfth century, to study Farabian logic meant traveling to North  Africa.[10] Spain and North Africa were its last strongholds, and the work of Averroes  (see 1.4.2 below) is best understood as a commentary on Aristotle determined in its focus and direction by the criticisms of Avicenna.