A theory that understood this concept using causal chains was later challenged with “fake barn” cases introduced by the reliabilist (10[1])thinker Alvin Goldman. Four conditions need to be met in the truth-tracking theory of this concept proposed by Robert Nozick. A three-page 1963 paper challenges a definition of this concept with a case where Smith thinks Jones (10[1])will get a job and also has ten coins in his pocket. (-5[1])That case, (-5[1])developed by Edmund Gettier, challenges Plato’s definition of this concept in the Theaetetus as “justified true belief.” (10[1])This concept is studied (-5[1])in epistemology. (10[1])For 10 (10[1])points, skeptics doubt the existence of what concept that Francis Bacon claimed “is power”? (10[1])■END■ (10[2])