 analytic/synthetic distinction |  a priori justification and knowledge |  Carnap, Rudolf |  Cassirer, Ernst |  confirmation |  empiricism: logical |  epistemology |  Feigl, Herbert |  Frege, Gottlob |  Gödel, Kurt |  Hempel, Carl |  Kuhn, Thomas |  logicism and neologicism |  Mach, Ernst |  Neurath, Otto |  physicalism |  Popper, Karl |  Quine, Willard Van Orman |  -->reduction--> |  Reichenbach, Hans |  Russell, Bertrand |  Schlick, Moritz |  Tarski, Alfred |  truth: correspondence theory of |  truth: deflationation about |  Wittgenstein, Ludwig 