User blog comment:Merlin919/Is Morgause, Vivienne and Gorlois's daughter/@comment-3012002-20120816010259/@comment-5102537-20120816110302

It wasn't said that Morgana recognized Morgause but that she thought she knew her. This can happen when you meet a relative you have never seen before because there are resemblences with parents/aunts/uncles and there is also everything we subconsciously notice, like smell, voice, mimics...

I once coincidentally met a cousin I hadn't known of my whole life. Before we found out that we are related, we thought that we had met before because he reminded me of my grandfather and I reminded him of his aunt. We felt like we had met before although we had not.

And on another occasion I met a female classmate of whom I thought we had met before, maybe in our childhood, but we hadn't. We didn't know each other and lived in different cities. No relation, never met but I thought I have been knowing her my whole life anyway. Such things are weird sometimes.