 abduction |  agency |  common knowledge |  computational complexity theory |  epistemic paradoxes |  epistemology |  epistemology: social |  game theory: epistemic foundations of |  indexicals |  intention |  knowledge: analysis of |  logic: action |  logic: classical |  logic: combining |  logic: deontic |  logic: dynamic epistemic |  logic: epistemic |  logic: justification |  logic: modal |  logic: of belief revision |  logic: propositional dynamic |  logic: temporal |  model theory: first-order |  Peirce, Charles Sanders |  possibilism-actualism debate |  possible worlds |  quantifiers and quantification |  questions |  Russell’s paradox |  self-reference |  semantics: two-dimensional 