If I were Noodle, I wouldn't simply correct Think-Tank's mistakes directly. Instead, I'd use a gentle, encouraging approach, focusing on the process rather than solely the outcome. I'd ask leading questions to guide him towards self-discovery of his errors, fostering independent learning. For example, instead of saying 'That's wrong,' I'd ask, 'What makes you think that's the solution? Let's explore other possibilities.' This approach builds confidence and encourages critical thinking, ultimately leading to more effective problem-solving in the long run.