Individual km#computational_tree_logic__CTL
  >part of:  km#temporal_logic  system of rules and symbolism for representing, and reasoning about, propositions qualified in terms of time
     >part of:  km#modal_logic__intensional_logic__intensionallogic  sentences are qualified by modalities such as possibly and necessarily; both "Bush is president" and "2+2=4" are true, yet "Necessarily, Bush is president" is false, while "Necessarily, 2+2=4" is true
        >part of:  km#formal_logic
           >part of:  #logic.philosophy  the branch of philosophy that analyzes inference
              >part of:  #philosophy  the rational investigation of questions about existence and knowledge and ethics

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