certitude

is only achievable in immanence. The ultimate content of this certitude is incommunicable.

For both philosophers it turns out that ultimate certitude can be achieved onty in immanence and that the ultimate content of this certitude is incommunicable. (kolakowski 'husserl and the search for certitude: 72)

's impossiblity is no more justification for disbelieve, than is the man's refusal to use his legs -- instead sitting still and perishing --- on account that he has no wings.

If we will disbelieve everything because we cannot certainly know all things, we shall do much as wisely as he who would not use his legs, but sit still and perish because he had no wings.

certitude, n.All

certitude