Oubt is the key to knowledge(persian proverb). To what extent is this true in two areas of knowledge?

Theory of Knowledge Essay (philosophy)

The title raises generic cross-disciplinary questions about knowledge, and the student is expected to consider the issues raised in the title and reach conclusions about them. The essay should put forward claims and counterclaims, linking knowledge issues to areas of knowledge and ways of knowing, and show evidence of original thinking by the student. Essays outside the 1,200 1,600 word length (excluding any references and bibliography) are penalized.
Harvard Style