Before I try to show that the logical method of the idealist philosophy, which pragmatism condemns because it leads to "useless" knowledge, is identical in every respect with the method employed in pure mathematics and physics, I will give for comparison two illustrations { 58} that seem to me instances of a narrow and of a wide use of the concept of utility.
A short time ago an orang-utang escaped from its cage in the Zoological Gardens under somewhat singular and very interesting circumstances. The cage was secured with meshed wire of great strength, judged sufficient to resist the direct impact of the most powerful of the carnivora; but the ape, by attention to the twisting of the plied wire, had by constant trying succeeded in loosening and finally in unwinding a large section. It escaped from its enclosure, and after doing considerable damage in the corridor, including the tearing out of a window frame, made its way into the grounds and took refuge in a tree, twisting the branches into a platform said to be similar to the constructions it makes in its native forests.
In taking this action as an illustration, I am not concerned with the question of what may be the distinction between action that is intelligent and action that is instinctive. If we take intelligence in a wide and general meaning, we may compare the intelligence shown by this ape with the intelligence shown by man in the highest processes of the mind. Psychologists would, I think, be unanimous in holding that in the mind of the ape there was no conception of freedom, no kind of mental image of unrestricted life and of a distinct means of attaining it, no clearly purposed end, the means of attaining which was what prompted the undoing of the wire, such as we should certainly suppose in the case of a man in a similar situation. It was the kind of intelligent action that psychologists denote by the description "trial and error." It seems to me, however, that this exactly fulfils the conditions that the pragmatist doctrine of the meaning of truth require. We see the intellect of the ape making true by finding out what works. { 59} We can suppose an entire absence of the idea of objective truth to which reality must conform, of truth unaffected by purpose. Here, then, we seem to have the pure type of truth in its simplest conditions, a practical activity using intelligence to discover what works. Is the difference between this practical activity and the higher mental activities as we employ them in the abstract sciences one of degree of complexity only, or is it different in kind?