Truth And Falsehood
Bertrand Arthur William Russell (1872-1970), 3rd Earl Russell OM FRS was a British polymath, philosopher, logician, mathematician, historian, writer, social critic, political activist, and Nobel laureate. This is a chapter from his book- THE PROBLEMS OF PHILOSOPHY
Although truth and falsehood are properties of beliefs, yet they are in a sense extrinsic properties, for the condition of the truth of a belief is something not involving beliefs, or (in general) any mind at all, but only the objects of the belief.
Our knowledge of truths, unlike our knowledge of things, has an opposite, namely error. So far as things are concerned, we may know them or not know them, but there is no positive state of mind which can be described as erroneous knowledge of things, so long, at any rate, as we confine ourselves to knowledge by acquaintance. Whatever we are acquainted with must be something; we may draw wrong inferences from our acquaintance, but the acquaintance itself cannot be deceptive.