 The former of the two criteria is central to the concerns of the philosophy of science. Its precise meaning has been the subject of important controversies among philosophers, to be discussed below in Section 4.  The second criterion has been less discussed by philosophers, but it needs careful treatment not least since many discussions of pseudoscience (in and out of philosophy) have been confused due to insufficient attention to it. Proponents of pseudoscience often attempt to mimic science by arranging conferences, journals, and associations that share many of the superficial characteristics of science, but do not satisfy its quality criteria. Naomi Oreskes (2019) called this phenomenon “facsimile science”. Blancke and coworkers (2017) called it “cultural mimicry of science”.