 The remarkable fact that is of most interest to us is that, because Unruh's arguments relied only on simple physical properties of no-escape boundaries and the low-energy behavior of thermalized radiation caused by scattering of fields off of such boundaries, Unruh concluded that these so-called “dumb holes” (dumb because silent) could serve as experimentally viable proxies for testing the existence of Hawking radiation for black holes (Leonhardt and Philbin 2008). In particular, the validity of the analogue models is argued for on the grounds that the essential features of Hawking radiation are due solely to a few simple, formal kinematical conditions satisfied by a wide range of kinds of physical systems (Visser 1998a, 2013; Unruh and Schützhold 2005; Unruh 2014). In particular, the manifestation of radiation-like behavior formally analogous to true Hawking radiation from a black hole has nothing to do with any specific, dynamical features of general relativity. Therefore, the thought goes, to detect the analogue of Hawking radiation in any of these systems provides indirect but strong confirmational support for the existence of actual Hawking radiation. There are, moreover, now several claims to have experimentally detected analogue Hawking radiation: Belgiorno et al. (2010) based on ultrashort laser pulse filaments, i.e., intense laser pulses in a transparent Kerr medium (those with a third-order optical nonlinearity); Weinfurtner et al. (2011) based on obstructed supersonic fluid flow; Steinhauer (2014) based on a “black-hole laser” composed of phonons in an Einstein-Bose condensate; and the list goes on. So, has Hawking radiation been experimentally confirmed, even if only indirectly? 