“Which” qualifies, “that” restricts

[cema]

I have not realized that.

Comments

[cema.livejournal.com]

Yes, a little bit of "unlearning" may sometimes be required from advanced students of the language if they had studied it from the books.

[ge-m.livejournal.com]

My point is opposite.
I was willing to "unlearn" and I did unlearned and now, in this text, I see that I knew it correct from the beginning.
I did not have to unlearn (in this case)!

Обидно за свой конформизм!

[cema.livejournal.com]

Desunlearn!