 Historians of philosophy (such as Hegel, Hadot, Cooper, among others) tend to marginalize the ancient Cynics as philosophically uninteresting, and moreover as irrelevant for a proper understanding of the sense in which philosophy in antiquity used to be a way of life. To be sure, the Cynics lived very distinctive and unconventional lives, but whatever it was that they were doing, it cannot have been - so the historians claim - a conduct rooted in philosophical reason and argument. This paper first musters the grounds typically given for this kind of deflationary view and then proceeds to examine the sparse but nevertheless suggestive evidence about ancient Cynicism that the (predominantly Stoic) doxographical tradition handed down to us. In the end, it comes to a conclusion that is diametrically opposed to the prevailing opinion of the cynics as inconsequential non-philosophers.