And furthermore, the difficulty arises regarding the success, for behold, it is stated in the Gemara (Chullin 6b): "Rav Yehuda said in the name of Rav, one who checks must annul." Rashi explains (s.v. habodek): "In his heart, immediately before the examination, he says, 'Any chametz that I have in my possession shall be nullified.'" The difficulty arises, for apparently the beginning and end of Rashi's explanation contradict each other, as he starts with annulment in the heart, implying that thought is sufficient, and concludes that one must say it aloud, implying that it is not enough without verbal expression.

One can explain this in two ways: a. The primary annulment is in thought, and verbal expression is only for the sake of disclosing one's intention, as written by the Ran and also by the Re'ah in his approach, that disclosure of intention is necessary in annulment, and this is achieved through verbal expression. The need for verbal expression can be elucidated to prevent something from remaining only in the realm of thought, and further examination is required. b. So that one's thought is absolute and complete, and this method is more reasonable, though it requires clarification.