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 (10[1])challenges a definition of this concept (10[1])with a case where Smith thinks Jones (10[1])will get a job and also has ten coins in his pocket. That case, developed by Edmund Gettier, challenges (-5[1])Plato’s definition of this concept in the (10[1])Theaetetus as “justified true (10[1])belief.” This concept is (-5[1])studied in epistemology. For 10 points, (10[1])skeptics doubt the existence of what concept that Francis Bacon claimed “is power”? ■END■ (10[2])