The term 'If You Say So' is an expression used to indicate that one is not convinced of something, but will accept it as true. The two crossword solutions for this term are 'HUMPH' and 'IGUESS'. 'HUMPH' is an interjection used to express disapproval, doubt, or resignation. It is often used in response to a statement that one does not agree with. 'IGUESS' is an informal way of expressing agreement or acceptance of something, usually with a hint of reluctance. Both of these words can be used to express the sentiment of 'If You Say So'.