Six quasi-evaluation approaches use an objectivist epistemology. Some philosophers, such as Tibor Machan, have argued that the Objectivist epistemology is incomplete. Objectivist epistemology maintains that all knowledge is ultimately based on perception. They are based on an objectivist epistemology from an elite perspective. Objectivist epistemology begins with the principle that "consciousness is identification". Peart has often been categorized as an Objectivist and an admirer of Ayn Rand. Goodkind has been influenced by the work of Ayn Rand and Objectivist philosophy. His name along with his objectivist philosophy are inspired by Ayn Rand. Consumer-oriented studies are based on an objectivist epistemology from a mass perspective. The episode contains multiple references to Ayn Rand's novels and Objectivist philosophy. While in London, he came across the writings of novelist and Objectivist Ayn Rand. He is an Objectivist and a board member of the Ayn Rand Institute. His book, "How We Know&colon; Epistemology on an Objectivist Foundation", was published in 2014. His third ex-wife is Objectivist philosopher Amy Lynn Peikoff. The book covers ethical issues from the perspective of Rand's Objectivist philosophy.