This holds that the acquisition of knowledge can be explained by justified true belief. Justified true belief was defined by Plato in his work Theatetus. This says that in order for anyone to truly know a thing, that thing: must be true; we must believe it; and there must be sufficient evidence for it (i.e., it must be justified). "If a belief is justified, there is something which justifies it. The thing which justifies a belief can be called its justifier. If a belief is justified, then it has at least one justifier What sort of thing can be a justifier Three things that have been suggested are: beliefs only; beliefs together with other conscious mental states; and beliefs, conscious mental states, and other facts about us and our environment (which we may not have access to)" (Answers.com, 2005). Gettier posed the question: "Is justified true belief knowledge" In his paper, Gettier set forth conundrums which he believed demonstrated a fallacy with justification of belief into knowledge.
d. Jones is the man who will get the job, and Jones has ten coins in his pocket. Smith's evidence for (d) might be that the president of the company assured him that Jones would in the end be selected, and that he, Smith, had counted the coins in Jones's pocket ten minutes ago. Proposition (d) entails:
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