[syockit]

That is strange, I thought this had always been the case. Long ago, I had a chat about feature selection and dimension reduction, and I expressed my preference of not resorting to PCA because it doesn't actually remove features. After some time, I had a new session chatting about multicollinearity and what adverse effects it might cause, and among the suggestions for addressing that, it suggested dimension reduction, saying "Although you don't prefer PCA ...".

[siva7]

This is a separate feature called memories. It saves preferences for future chats you tell it to remember. These snippets can be viewed in your settings.