Every person who drinks alcohol to excess will not show every form of mental deterioration that may be produced by excessive indulgence, and the degree of deterioration in intelligence which goes to make up the sum total of mentality varies greatly in different individuals. All who drink alcohol to excess, however, show some diminution in their judgment. Judgment means the power of recalling various memories of perceptions through the senses, which have come in from the outside world, memories of ideas, memories of emotions, and all the complicated association of ideas that these bring up, and in the recalling of them weigh each one with the other and judge of the value between them. This also means reasoning and decision for action. This power of reasoning and judging is weakened in the alcoholic, and in any brain long poisoned by alcohol it is an impossibility to exercise it. Memory itself is also weakened. There is excessive forgetfulness of the recent past, and in some cases of advanced alcoholism there is absolute forgetfulness of wide gaps of years; a man may be unable to remember anything from the last five minutes back for twenty years, and then remember back to childhood. The memories of childhood are more easily stamped on the brain than are those of adult life, both because it takes less to impress a child, and because there is not the complexity of ideas crowding into the brain, nor the complexity of association of ideas to be recorded. Therefore memories of childhood make a deeper impress and last longer, and so the complex memories of the adult are the first to be forgotten in the alcoholic, and those of childhood remain. EFFECT UPON MEMORY AND JUDGMENT Besides the absolute forgetfulness, there is another form of forgetfulness in the alcoholic which often produces a ludicrous result. This is a perversion of memory. The person may be in a perfectly strange place and meet strangers, and yet be convinced that he has seen the place and met the strangers before, and greet them as old friends. This feeling of having been there before occurs in normal, healthy people, and may be simply the expression of momentary fatigue, or proceed from some unknown cause; but it is grossly exaggerated in the alcoholic, and cannot as easily be straightened out as in the normal mind.