THEORY

(noun) a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
"a scientific hypothesis that survives experimental testing becomes a scientific theory", "he proposed a fresh theory of alkalis that later was accepted in chemical practices"
synonyms : hypothesis , possibility
(noun) a belief that can guide behavior
"the architect has a theory that more is less", "they killed him on the theory that dead men tell no tales"
(noun) a well-substantiated explanation of some aspect of the natural world; an organized system of accepted knowledge that applies in a variety of circumstances to explain a specific set of phenomena
"theories can incorporate facts and laws and tested hypotheses", "true in fact and theory"

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