Alexander, Samuel (1859-1938) Space, Time and Deity:
The Gifford Lectures at Glasgow, 1916-1918, Vol II.
Book III. The Order and Problems of Empirical Existence
Chapter IX. Value
B. Truth and Error
...We may ask the question, what makes truth? in different senses. We may mean, what propositions must I believe to have truth? The answer to this question is supplied by the sciences, including the science of philosophy. Every science consists of a body of propositions organised and systematised in a certain fashion, and in so far as these propositions are related to the mind which contemplates (or enjoys) them. That is to say, a science is all the true physical (or mental) facts belonging to any department of reality, in so far as they are the possession of minds which think truly. Physics is the universal and particular facts comprehended within physical existence, regarded as true, that is, as possessed by minds which are scientific. Outside the relation to the minds which know them, and without which they would not be true, there is nothing in a science but that reality with which it deals.
...Hence since knowledge and science are generally understood with the implied emphasis on their truth, they are not reality itself but that reality as possessed by minds.
...Thus while on its objective or contemplated side, error is detected by being convicted of introducing an element of reality which does not belong to the reality investigated, on its subjective or believing side it fails to cohere with the social believings.
Book III. The Order and Problems of Empirical Existence
Chapter IX. Value
B. Truth and Error
...We may ask the question, what makes truth? in different senses. We may mean, what propositions must I believe to have truth? The answer to this question is supplied by the sciences, including the science of philosophy. Every science consists of a body of propositions organised and systematised in a certain fashion, and in so far as these propositions are related to the mind which contemplates (or enjoys) them. That is to say, a science is all the true physical (or mental) facts belonging to any department of reality, in so far as they are the possession of minds which think truly. Physics is the universal and particular facts comprehended within physical existence, regarded as true, that is, as possessed by minds which are scientific. Outside the relation to the minds which know them, and without which they would not be true, there is nothing in a science but that reality with which it deals.
...Hence since knowledge and science are generally understood with the implied emphasis on their truth, they are not reality itself but that reality as possessed by minds.
...Thus while on its objective or contemplated side, error is detected by being convicted of introducing an element of reality which does not belong to the reality investigated, on its subjective or believing side it fails to cohere with the social believings.