Step 1: Understanding the Concept:
Goethe's quote suggests a positive correlation between knowledge and doubt. As a person's knowledge increases, they become more aware of complexities, nuances, and the vastness of what they don't know. This leads to an increase in doubt and a decrease in certainty. This is often contrasted with the overconfidence of the ignorant (a concept related to the Dunning-Kruger effect).
Step 2: Detailed Explanation:
Let's analyze each statement based on this interpretation:
A. The less one knows, the more sure one is. This is the logical inverse of the quote. If more knowledge leads to more doubt, then less knowledge must lead to less doubt, which implies greater sureness or certainty. This statement is a valid corollary.
B. Knowing is the cause of doubtfulness. This is a direct causal interpretation of the quote "Doubt grows with knowledge." It states that the act or state of knowing is what brings about doubt. This is a true restatement of the core idea.
C. The more one knows, the more sure one is. This statement is in direct contradiction to the quote's meaning. It posits a relationship opposite to the one suggested by Goethe.
D. Knowing means having more doubts. This is another direct interpretation of the quote. It equates the process of gaining knowledge with the experience of accumulating doubts. This is also a true restatement.
Step 3: Final Answer:
Statements A, B, and D are all true from the perspective of Goethe's quote.