Examples involving houses with barn facades and a job interviewee with 10 c
Examples involving houses with barn facades and a job interviewee with 10 coins in his pocket challenge the classical definition of this concept. Those are Gettier problems, which involve a degree of luck. It is innate to the Forms and achieved through recollection, according to the dialogue Meno. The world of the Forms outside the Cave represents this concept reached by philosophers in the Allegory of the Cave. The evil demon challenges the extent of this concept, which can come in a posteriori or a priori types. It is studied in epistemology and traditionally defined as justified true belief. For 10 points, name this concept, the absence of which is ignorance. 
Examples involving houses with barn facades and a job interviewee with 10 coins in his pocket challenge the classical definition of this concept.
knowledge [prompt on truth; prompt on belief] 