ABSTRACT
This part of the logic which contains the Doctrine of the Notion and constitutes the third part of the whole, is also issued under the particular title System of Subjective Logic. If the building of a new city in a waste land is attended with difficulties, yet there is no shortage of materials. But, the abundance of materials presents all the more obstacles of another kind when the task is to remodel an ancient city. Among other things one must resolve to make no use at all of much material that has hitherto been highly esteemed. Pilate's question bears the meaning-which may be regarded as an element in good manners-together with a reminder of it, that the aim of attaining truth is, as everyone knows, something given up and long since set aside, and that the unattainableness of truth is recognized even among professional philosophers and logicians.
