If you're not certain which part of your knowledge is true, than there is no difference between what I said and what you said. Because you knew that "that" part of your knowledge was true, but it wasn't true as it turns out 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 that "that" part of your knowledge was true, but it wasn't true as it turns out after further inquiry.