In the pursuit of knowledge by description, wrong assumptions are possible. When we try to discuss the knowledge of truths, it becomes clear that this type of knowledge, as opposed to the knowledge of things, has a problematic opposite called ‘error’. There exists a dualism; we believe things falsely as well as truly. Since many people hold different and incompatible beliefs, some of them must be erroneous. The urgent question on this issue is how to distinguish truly held beliefs from those falsely held. Perhaps, no satisfactory answer is possible, but before approaching possible answers, there must first be an investigation into the meaning of the concepts of truth and falsehood. This article is an approach to explain the human analysis and knowledge of the thought – ‘truth’.