[ US /ˈθiɝi, ˈθɪɹi/ ]
[ UK /θˈi‍əɹi/ ]
  1. 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
  2. a belief that can guide behavior
    they killed him on the theory that dead men tell no tales
    the architect has a theory that more is less
  3. 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
    true in fact and theory
    theories can incorporate facts and laws and tested hypotheses
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How To Use theory In A Sentence

  • His work is thus marked with a bitter irony which permeated not only the substance of his theory but also its method.
  • Contrary to what has been claimed, the theory is not insulated against attempts to disconfirm it.
  • The theory I do not accept: one simply folds his sails, unships his rudder, and waits the will of Providence, or the arrival of some compelling fate. Saunterings
  • differences between theory and praxis of communism
  • Also, it is difficult to get across diagrammatically the iterative nature of grounded theory - in particular its commitment to the idea that data collection and analysis occur in parallel.
  • Laplace called probability theory ‘the calculus of inductive reasoning.’
  • This was the theory of alienation whereby the audience, already familiar with the story line, does not get caught up with the narrative.
  • Any attempt to disprove the theory of evolution using thermodynamics will require proper formalisms.
  • His theory was that animals were the ‘slaves of man’ and he spoke of the ‘tyranny of humans over non-human animals.’
  • He is a Berlin gestaltist who emigrated to the United States, became professor of the Psychology of Art at Harvard University and published 13 books on gestalt theory and art.
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