The most common defect which one could discover in the conversation of a woman, if one really wished to apply to it the standard of logic (a feat that man habitually shuns, so showing his contempt for a woman’s logic) is the _quaternio terminorum_, that form of equivocation which is the result of an incapacity to retain definite presentations; in other words the result of a failure to grasp the law of identity. Woman is unaware of this; she does not realise the law nor make it a criterion of thought. Man feels himself bound to logic; the woman is without this feeling. It is only this feeling of guilt that guarantees man’s efforts to think logically. Probably the most profound saying of Descartes, and yet one that has been widely misunderstood, is that all errors are crimes. The source of all error in life is failure of memory. Thus logic and ethics, both of which deal with the furtherance of truth and join in its highest service, are dependent on memory. The conception dawns on us that Plato was not so far wrong when he connected discernment with memory. Memory, it is true, is not a logical and ethical act, but it is a logical and ethical phenomenon. A man who has had a vivid and deep perception regards it as a fault, if some half-hour afterwards he is thinking of something different, even if external influences have intervened. A man thinks himself unconscientious and blameworthy if he notices that he has not thought of a particular portion of his life for a long time. Memory, moreover, is linked with morality, because it is only through memory that repentance is possible. All forgetfulness is in itself immoral. And so reverence is a moral exercise; it is a duty to forget nothing, and for this reason we should reverence the dead. Equally from logical and ethical motives, man tries to carry logic into his past, in order that past and present may become one. It is with something of a shock that we realise here that we approach the deep connection between logic and ethics, long ago suggested by Socrates and Plato, discovered anew by Kant and Fichte, but lost sight of by living workers. A creature that cannot grasp the mutual exclusiveness of A and not A has no difficulty in lying; more than that, such a creature has not even any consciousness of lying, being without a standard of truth. Such a creature if endowed with speech will lie without knowing it, without the possibility of knowing it; _Veritas norma sui et falsa est_. There is nothing more upsetting to a man than to find, when he has discovered a woman in a lie, and has asked her, “Why did you lie about it?” that she simply does not understand the question, but simply looks at him and laughingly tries to soothe him, or bursts into tears.