 However, it still needs to be shown that in the particular case of universal representation the mismatch between the mode of its representation and the mode of being of the thing represented does in fact not entail the falsity of the representation. This can easily be seen if we consider the fact that the falsity of an act of understanding consists in representing something to be in a way it is not. That is to say, properly speaking, it is only an act of judgment that can be false, by which we think something to be somehow. But a simple act of understanding, by which we simply understand something without thinking it to be somehow, that is, without attributing anything to it, cannot be false. For example, I can be mistaken if I form in my mind the judgment that a man is running, whereby I conceive a man to be somehow, but if I simply think of a man without attributing either running or not running to him, I certainly cannot make a mistake as to how he  is.[12]  In the same way, I would be mistaken if I were to think that a triangle is neither isosceles nor scalene, but I am certainly not in error if I simply think of a triangle without thinking either that it is isosceles or that it is scalene. Indeed, it is precisely this possibility that allows me to form the universal mental representation, that is, the universal concept of all particular triangles, regardless of whether they are isosceles or scalene. For when I think of a triangle in general, then I certainly do not think of something that is a triangle and is neither isosceles nor scalene, for that is impossible, but I simply think of a triangle, not thinking that it is an isosceles and not thinking that it is a scalene triangle. This is how the mind is able to separate in thought what are inseparable in real existence. Being either isosceles or scalene is inseparable from a triangle in real existence. For it is impossible for something to be a triangle, and yet not to be an isosceles and not to be a scalene triangle either. Still, it is not impossible for something to be thought to be a triangle and not to be thought to be an isosceles and not to be thought to be a scalene triangle either (although of course, it still has to be thought to be either-isosceles-or-scalene). This separation in thought of those things that cannot be separated in reality is the process of  abstraction.[13]  In general, by means of the process of abstraction, our mind (in particular, the faculty of our mind Aristotle calls active intellect (nous poietikos, in Greek, intellectus agens, in Latin) is able to form universal representations of particular objects by disregarding what distinguishes them, and conceiving of them only in terms of those of their features in respect of which they do not differ from one another.