A “sensitivity” condition for this concept leads to “abominable conjunctions” according to Keith DeRose, who holds a contextualist approach to this concept. The “[this concept] first” stance stating that it is a mistake to analyze it is from a book titled [this concept] and Its Limits by Timothy Williamson. (15[1])A defender of the reliabilist theory of this concept proposed “fake barn cases” as a counterexample to the (*) causal theory of it put forth by himself, Alvin Goldman. One philosopher attacked conditions for this concept (10[1])by describing a job application going to someone with 10 coins (10[1])in his pocket. A short paper using two cases (10[1])to attack a definition of this concept was written by Edmund Gettier. For 10 points, name this concept studied in epistemology that is sometimes defined as “justified true belief.” ■END■