The Importance of Doubt in Knowledge

Karl Popper once said, It is impossible to speak in such a way that you cannot be misunderstood. So it is with all knowledge. We always have doubts. We can always misunderstand. We can never be certain. When people say they know X, they're not saying they can't actually change their mind. Yes, of course, some people are dogmatists and claim not to doubt X when X is either something really obvious or something that is really important to them. But they're thinking these things does not change the true structure of knowledge,. People are always fallible humans. The justified true belief mistake handed down to us from Plato remains deeply ingrained in our language and ways of thinking