[4] His work on Why Existence does not Emerge as a Distinct Concept in Greek Philosophy[5] is remarked 24 years after its appearance by Allan Back in his book on Aristotle's Theory of Predication.
Kahn sees that Aristotle does not isolate existence as a separate topic or as a "central and implicit theme" of his philosophy.
[6] In terms of the nature of Being, Kahn maintains that notions in the contemporary analytical philosophy appear to form a heterogeneous bundle with no focal concept of "be" to hold them together.
[10] In 2009, Kahn was feted with a festschrift, the collected papers of which were gathered into a celebratory volume of this author of whom it is said that "in these subject areas (Presocratics and Plato) that the distinction of his scholarship has come to be regarded as virtually unrivaled".
[10] In 2014, Kahn was the inaugural winner of the Werner Jaeger Award, given by the German Gesellschaft für antike Philosophie.