Now since the time during which we are asleep is equal to that during which we are awake, in each state our spirit contends that the semblances that appear to it at any time are certainly true, so that for half the time we say that this is true, and for half the time the other, and we maintain each with equal confidence.

TheaetetusCertainly.

SocratesAnd may not, then, the same be said about insanity and the other diseases, except that the time is not equal?

TheaetetusYes.

SocratesWell, then, shall truth be determined by the length or shortness of time?