Dumbledore it seemed didn’t require an answer from him. He, just like Granger, had already formed an idea and was just testing it out. "Your magic, it seems, has always been grounded to your father. His approval, disapproval, disappointments directed your magic. But since he went to Azkaban, you have lost that stable ground. So you need to find something to believe in. Every magic needs a root. Your task would be to find your root again.’