| 31. | An assumption establishes a condition that a formal logic proving tool must assume to be true.
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| 32. | They may also use formal logics that are stronger than first-order logic, such as type theory.
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| 33. | Premises in formal logic are commonly represented by letters ( most commonly p and q ).
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| 34. | The significance of argument in formal logic is that one may obtain new truths from established truths.
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| 35. | Logician and philosopher Alfred Tarski developed the theory for formal languages ( such as formal logic ).
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| 36. | Leibniz also worked on formal logic but most of his writings on it remained unpublished until 1903.
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| 37. | The development of formal logic and its implementation in computing machinery is the foundation of computer science.
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| 38. | They created a work, Principia Mathematica, which derived number theory by the manipulation of symbols using formal logic.
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| 39. | Besides writing an influential introductory book into the formal logic which is today a standard work on fallacies.
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| 40. | In the name of nonsense, it is finally refused the conception of duality and the Aristotelian formal logic.
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