A theory that understood this concept using causal chains was later challenged with “fake barn” cases introduced by the (10[1])reliabilist 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 will get a job and also has ten coins in his pocket. That case, developed by Edmund Gettier, (-5[1])challenges Plato’s definition of this concept in the Theaetetus (-5[1])as “justified true belief.” (10[1])This concept is studied in epistemology. (10[2]-5[2])For (10[1])10 points, (-5[1])skeptics doubt the existence of what concept that Francis Bacon claimed “is power”? (10[2])■END■ (10[3])