It does not do to trust to memory for these things.

对这些事光凭记忆是不行的。

youdao

Don't trust to your own memory too much.

不要过分相信自己的记忆力。

《新英汉大辞典》

‘It's good to have an informed doubt or informed scepticism about your memory performance, so you don't just easily trust whatever comes to your mind as true and for granted.’

有人告诉你要对自己的记忆表现产生怀疑或疑虑是很好的，这样你就不会只简单地相信记忆中的一切都是真的。

youdao

Rebecca Wood, chief executive of the Alzheimer's Research Trust, said it was important to stress that the study only focussed on people with pre-existing memory conditions.

BBC: Money problems 'signal dementia'