My wife's neurologist has said many times "if you have seen a 1000 cases of MCI/dementia/Alzheimer, you have only really seen ONE because each case is unique". My wife has had MCI for a few years but now she is forgetting many simple things. Her neurologist has said "MCI is related to forgetting but dementia is more about confusion" After 53 years of marriage, it's tough to see your partner slipping away. What ever his problem is, hold him tight and be thankful you still have him. Yes, guys can be stubborn and angry but if you have lived with him as long as you have, be happy you still have him and don't look too far into the future. take each day as it comes and enjoy it.