Some people can be quite dogmatic and stick to their views despite evidence and argument to the contrary, and that of course is not helpful. However, it can also be problematic when some people go to the opposite extreme and simply assume that they are wrong whenever they encounter any resistance or disagreement. What is needed, of course, is a balanced approach. Being dogmatic does not help, but nor does abandoning your views prematurely. Being open minded is essential, but that need to include being open to the possibility that you were right all along.
Ensuring every older person is treated with dignity as a unique individual