 The logician W. V. O. Quine (1953) agrees with Weiss’ conclusion that the teacher’s announcement of a surprise test fails to give the student knowledge that there will be a surprise test. Yet Quine abominates Weiss’ reasoning. Weiss breeches the law of bivalence (which states that every proposition has a truth-value, true or false). Quine believes that the riddle of the surprise test should not be answered by surrendering classical logic.