Ordinary knowledge encompasses multiple types, including perceptual, self-knowledge, and knowledge of others. Epistemology of ordinary knowledge has been overlooked in favor of scientific knowledge.
Many philosophers reduce ordinary knowledge to sensory or, more generally, to perceptual knowledge, which refers to entities belonging to the phenomenic world.
ordinary language users possess structures of knowledge, reasonably so called, of a complex system of rules or principles of language. (2003b, 3). And Robert Matthews characterizes what he calls the Received View similarly

Moving forward, it's essential to keep these visual contexts in mind when discussing Accord Ir Ordinary Knowledge.
(d) Although empirical science shares many logical features with ordinary knowledge and other cognitive claims, assertions about truth and certainty should always be interpreted according to the different goals and the corresponding standards of every human enterprise.
According to Descartes, his reasoning establishes that, what he originally doubted, he actually knows, with certainty.[11] He thereby defeats the skeptical concerns that he considered earlier. 4. Conclusion: Knowledge without Certainty.

. Abstract: This article is devoted to the consideration of the concepts of ordinary and scientific knowledge, their distinctive features.