Individual km#epistemic_logic__epistemiclogic
  >part of:  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:  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

No statement uses or specializes epistemic_logic; click here to add one.