If you're not certain which part of your knowledge is true, then there is no difference between what I said and what you said. Because you knew a certain part of your knowledge was true, but it turned out not to be after further inquiry.
If you're not certain which part of your knowledge is true, then there is no difference between what I said and what you said. Because you knew some part of your knowledge was true, but it turned out not to be after further inquiry.