My father is 60 years old and since the last few years, they face difficulty in understanding and analyzing complex thoughts. (They were extremely good in these tasks till their 40s). Besides, they loose their temper very quickly, irritated most of the time and never ever willing to take any external help. We tried certain puzzles, brain training apps and other things but they are always reluctant. With time, we feel their cognitive abilities are deteriorating very fast. What shall we do?