"A Causal Theory of Knowing" is a philosophical essay written by Alvin Goldman in 1967, published in The Journal of Philosophy. It is based on existing theories of knowledge in the realm of epistemology, the study of philosophy through the scope of knowledge. The essay attempts to define knowledge by connecting facts, beliefs and knowledge through underlying and connective series called causal chains. It provides a causal theory of knowledge. A causal chain is repeatedly described as a sequence of events for which one event in a chain causes the next. According to Goldman, these chains can only exist with the presence of an accepted fact, a belief in the fact, and a cause for the subject to believe the fact. The essay also explores the ideas of perception and memory through the use of the causal chains and the concept of knowledge. Background The essay is regarded as an improvement and rebuttal of Edmund Gettier's "Is Justified True Belief Knowledge?", which is one of many attempts to explain the necessary conditions for knowledge to develop. Goldman implements the causal connection to reiterate his own theory of knowledge. Knowledge exists, says Goldman, if and only if the belief is justified by a reaction to the accepted fact. Goldman's theory later counters that of Michael Clark, stating that his own theory including figures and diagrams is more appropriate than Clark's. "A Causal Theory of Knowing" uses figures which make explicit references to causal beliefs. Clark's model does not utilize these arrows, and Goldman states that the lack of these arrows deems Clark's model deficient. Author Alvin Goldman, currently a professor of philosophy at Rutgers University, wrote "A Causal Theory of Knowing" when he was in his late twenties. Goldman received his Ph.D. from Princeton University, and has taught at numerous universities. Goldman's research deals mainly with epistemology and other cognitive sciences. "A Causal Theory of Knowing" was Goldman's first published paper explaining his own views of epistemology. Currently, Goldman has written more than ten essays focusing on knowledge and cognitive science. Contents The essay starts with a definition of Gettier's theory, followed by multiple reiterations of the idea of causal connections, figures to explain knowledge through a visual perspective, and references to perception and memory through causal chains. The essay tends to focus on examples in which knowledge or other sensations do not exist, rather than proving a certain fact to