unobservable
71B. F. Skinner — Burrhus Frederic Skinner Born March 20, 1904(1904 03 20) Susquehanna, Pennsyl …
72Category of being — In metaphysics (in particular, ontology), the different kinds or ways of being are called categories of being or simply categories. To investigate the categories of being is to determine the most fundamental and the broadest classes of entities.… …
73Comet — This article is about the astronomical object. For other uses, see Comet (disambiguation). Comet Hale– …
74Cogito ergo sum — Part of a series on …
75Dualism — For other uses, see Dualism (disambiguation). Dualism (from the Latin word duo meaning two ) denotes a state of two parts. The term dualism was originally coined to denote co eternal binary opposition, a meaning that is preserved in metaphysical… …
76Existentialism — The …
77Many-worlds interpretation — The quantum mechanical Schrödinger s cat paradox according to the many worlds interpretation. In this interpretation every event is a branch point; the cat is both alive and dead, even before the box is opened, but the alive and dead cats are in… …
78Event horizon — In general relativity, an event horizon is a boundary in spacetime, an area surrounding a black hole or a wormhole, inside which events cannot affect an outside observer. Light emitted from inside the horizon can never reach the observer, and… …
79Friedrich Nietzsche — Born October 15, 1844 Röcken bei Lützen, Prussia Died August 25, 1900(1900 08 25) (aged 55) Weimar, Saxony …
80Fundamental interaction — In physics, a fundamental interaction or fundamental force is a mechanism by which particles interact with each other, and which cannot be explained in terms of another interaction. Overview In the conceptual model of fundamental interactions,… …
