I strongly suspect the alcohol might be speeding up his deterioration, but the neurologist thinks it is something else. My wife has medical power of attorney, so the doctor can freely discuss the issues with her, and she with him. She has told the doctor about his drinking, but I am wondering if he is hiding some of it from us. He seems to have not changed his intake level for the past 20 years, and that strikes me as not the normal trend for an addicted drinker.