As regards knowledge of truths, there is a dualism. We may believe what is false as well as what is true. ...Since erroneous beliefs are often held just as strongly as true beliefs, it becomes a difficult question how they are to be distinguished from true beliefs. How are we to know, in a given case, that our belief is not erroneous? This is a question of the very greatest difficulty, to which no completely satisfactory answer is possible. There is, however, a preliminary question which is rather less difficult, and that is: What do we mean by truth and falsehood?

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "As regards knowledge of truths, there is a dualism. We may believe what is false as well as what is true. ...Since erroneous beliefs are often held just as strongly as true beliefs, it becomes a difficult question how they are to be distinguished from true beliefs. How are we to know, in a given case, that our belief is not erroneous? This is a question of the very greatest difficulty, to which no completely satisfactory answer is possible. There is, however, a preliminary question which is rather less difficult, and that is: What do we mean by truth and falsehood?" in the context of "Bertrand Russell (1912) The Problems of Philosophy" to mean that wisdom is timeless.