It may be difficult to convince the lay mind, and especially the legal mind, that an individual may be suffering from an actual psychosis and at the same time malinger mental symptoms. It is the legal mind especially, working as it does with well-differentiated, sharply-defined, and wholly artificial concepts, that demands a sharp, strict differentiation between the mentally well and the mentally sick. By means of man-made statutes a line has been created, on one side of which they would place all the mentally well and on the other side all the mentally diseased. By the same token they cannot conceive how an individual placed on one side of the line may be able to manifest a type of reaction, a form of conduct, which is by common consent considered as being something essentially characteristic of the man on the other side of the line, losing sight of the fact that in the evolution of the human mind Nature is far from drawing such sharp differentiations as are exemplified by legal statutes. It would certainly be very convenient, and expert testimony would certainly have been spared the disrepute into which it has fallen, were Nature more accommodating in this respect. But Nature does not work in this fashion; differentiation in Nature takes place through infinite gradations, and between the absolutely well mentally and the frankly insane there is a host of individuals concerning whom it is almost next to impossible to state to which of the above two groups they belong. Thus it is that the frankly insane at times manifest conduct which taken by itself differs in no way from normal conduct, and that the so-called normal individual at times exhibits a type of reaction which is essentially of a psychotic nature. To the psychiatrist it is a matter of common occurrence to see the mentally diseased not only dissimulate very ingeniously and tactfully mental symptoms so that it is frequently impossible to convince a jury of laymen of the existence of mental disorder, but at times, when the necessity arises, they consciously accentuate their symptoms or frankly malinger. There is nothing strange about this. There is absolutely no reason why the insane, in his desire to gain expression for his wishes and strivings, should not avail himself of the same means that normal man uses. The following case illustrates this very clearly:--