Dad was diagnosed with Alz a few months back. Most people probably would not realise, however he can be very "bad-tempered" and difficult with Mum. Although we all understand the diagnosis, Mum often attributes his hurtful verbal aggression to "unreasonable behaviour," rather than symptoms of the disease and she then becomes very upset. Any tips for trying to make her realise it's the illness, and not "the real him" and ways to defuse the arguments? Thanks.