day by new information as yet undiscovered?
tantamount to the declaration: “Human knowledge is limited, wo we cannot trust any of out conclusions.” Man is a being of limited knowledge-and he must, therefore, identify the cognitive context of his conclusions. In any situation where there is reason to suspect that a variety of factors is relevant to truth, only some of which are presently known, he is obliged to acknowledge this fact. The implicit or explicit preamble to his conclusion must be: “On the basis of available evidence, i.e., within the context of the factors so far discovered, the following is the proper conclusion to draw. Thereafter, the individual must continue to observe and identify; should new information warrants it, he must qualify his conclusions accordingly. If a man follows this policy, he will find that his knowledge at one stage is not contradicted by later discoveries. He will find that the discoveries expand his understanding; that he learns more about the conditions on which his conclusions depend; that
