unobservable
91Meaning of life — This article is about the philosophical concept. For other uses, see Meaning of life (disambiguation). Where Do We Come From? What Are We? Where Are We Going? One of Post Impressionist Paul Gauguin s most famous paintings. The meaning of life… …
92Mathematical formulation of quantum mechanics — Quantum mechanics Uncertainty principle …
93Nihilism — This article is about the philosophical doctrines. For other uses, see Nihilism (disambiguation). Certainty series Agnosticism Belief Certainty Doubt Determini …
94Natural law — For other uses, see Natural law (disambiguation). Natural law, or the law of nature (Latin: lex naturalis), is any system of law which is purportedly determined by nature, and thus universal.[1] Classically, natural law refers to the use of… …
95Ontology — This article concerns ontology in philosophy. For the concept in information science, see Ontology (information science). Not to be confused with the medical concepts of oncology and odontology, or indeed ontogeny. Parmenides was among the first… …
96Observation — Observations redirects here. For the travel book, see Observations (Pierre Belon). For other uses, see Observation (disambiguation). Observation is either an activity of a living being, such as a human, consisting of receiving knowledge of the… …
97Psychology — (from Greek gr. ψῡχή, psȳkhē , breath, life, soul ; and gr. λογία, logia ) is an academic and applied discipline involving the scientific study of mental processes and behavior. Psychologists study such phenomena as perception, cognition, emotion …
98Plato — For other uses, see Plato (disambiguation) and Platon (disambiguation). Plato (Πλάτων) …
99Parallax — For other uses, see Parallax (disambiguation). A simplified illustration of the parallax of an object against a distant background due to a perspective shift. When viewed from Viewpoint A , the object appears to be in front of the blue square.… …
100Physicalism — is a philosophical position holding that everything which exists is no more extensive than its physical properties; that is, that there are no kinds of things other than physical things. The term was coined by Otto Neurath in a series of early… …
