This is an assertion that sticks to empirical perception in the manner (which commonsense finds so illuminating) of a Diogenes who, when a dialectician pointed out the contradiction inherent in movement, is said not to have further strained his reason but, silently walking back and forth, deferred to the witness of the ey a claim and refutation which is surely easier to make than to let oneself be drawn into thoughts and pursue the complications to which thought itself leads (indeed, not far flung thought