Key to an understanding of the suicidal crisis is to accept the authors’ conviction that suicidal behavior is a learned method of problem solving. Thus, in chapter 4, Drs. Chiles and Strosahl define the "three Is": anyone can become suicidal if a situation produces emotional pain and is believed to be inescapable, interminable, and intolerable. Consequently, if a patient sees that all other reasonable, problem-solving options have become ineffective or have been tried and failed, then the option of suicide becomes increasingly more desirable. Rather than convince the patient that the suicidal act is wrong, it is preferable to intervene by getting the patient to acknowledge his or her ambivalence and to discover overlooked, alternative problem-solving options.