Discuss whether you would want to know if you were at high risk of getting Alzheimer's disease if such a test were available. Case in point ... the availability of a genetic test for Huntington's disease means that a child of someone with Huntington's can find out whether he or she carries the gene that will eventually lead to the disease. Even though there is such a test for Huntington's disease, which runs in families, many individuals prefer not to know. What are the pros and cons of knowing or not knowing you will develop a debilitating psychological and ultimately fatal condition?