But Foucault's argument is that waking consciousness effects this logical construction of the dream. Here his position is weak and incapable of proof. It is, indeed, contrary to all the tests we are able to apply to it. If it is the object of the logic of our dreams to make them conformable to our waking experience, that end, we must admit, is in most cases very far from being attained. In their original form, as Foucault views the matter, our dreams are simple dissociated images. In that shape they would present nothing whatever to shock the consciousness of waking life. The logic, hypothetically introduced solely to make them conformable to real life, is frequently a preposterous logic such as the consciousness of waking life could not accept or even conceive. This fact alone serves to throw serious doubt upon the theory that it is waking consciousness which impresses its logic upon our dreams. Nor, again, is there any analogy, and still less identity, between the process whereby we grasp a dream when we awake, and the process whereby the memory of a dream is transformed during months of waking life. The latter is part of a general process affecting all our memories in greater or less degree. I visit, for instance, a foreign cathedral, and take careful note of the character and arrangement of buttresses and piers; a few months later, if I have failed to set the facts down, my memory of them will become uncertain, confused, and incorrect. But I need not, therefore, lose faith in the tolerable exactitude of my original impressions. In the same way, we cannot argue that the shifting memory of a dream during a long period of time throws the slightest doubt on the accuracy of our original impression of it. We never catch a dream in course of formation. As it presents itself to consciousness on awakening there may be doubtful points and there may be missing links, but the dream is, once for all, completed, and if there are doubtful points or missing links we recognise them as such. We make no attempt to supply a logic that is not there, and we never see any such process going on involuntarily. I should, indeed, myself be inclined to say that there is always a kind of gap between sleeping consciousness and waking consciousness; the change from the one to the other kind of consciousness seems to be effected by a slight shock, and the perception of the already completed dream is the first effort of waking consciousness. The existence of such a shock is indicated by the fact that, even at the first moment of waking consciousness, we never realise that a moment ago we were asleep. As soon as we realise that we are awake it seems to us that we have already been awake for an uncertain but distinct period of time; some people, indeed, especially old people, on awaking, feel this so strongly that they deny they have been asleep. It once happened to me to be in the neighbourhood of a dynamite factory at the moment when a very disastrous explosion