The term DISBELIEVER'S QUESTION can be broken down into three crossword solutions: HOW (3 letters). The term is a phrase that implies a person who does not believe in something is asking a question. It suggests that the person is seeking an answer to their doubts or disbelief. The word 'how' is often used to ask questions, and in this case it is being used to express the disbelief of the person asking the question. This phrase is often used to express doubt or skepticism about a certain topic or idea.