I have seen this on a few occasions , especially with in laws which i informed hubby that i would no longer be in their company because if i said (corrected) them regarding their behaviour it would end up with a screaming session (not from me), but why do people think they can treat elderly and infirm people as if they cannot achieve anything. I recently started teaching a lady in her 80s how to work an apple mac. She said i will never get this , i said you told me you managed a staff of 80 when you were working, if you can manage that you can manage working a laptop. Last week daughter turn up she had previously told me not to show her mum too much as she wouldn’t get it. This week she said it again, there was a girl from the charity so not just me listening to this . However as the conversation proceeded daughter said i don’t understand this computer stuff, so because she didnt her mum she was assuming was the same. It upset me and my son said mum you cant change their way of thinking. But during my charity work i see this quite a bit . You try to help someone learn something new and the biggest obstacle is their family. Will speak to charity girl this week she may have some ideas.