I remember a short fragment from my first birthday. My mum held me in her lap and I sensed her stress and anxiety. I said "mummy sad". At first she didn't understand me so I had to repeat. She said "oh no, mummy is fine!" which frustrated me because I sensed it wasn't true but I couldn't understand it yet. Years later I asked her if that was true or a dream and she confirmed that yes it truly happened. She was stressed because I was supposed to go to surgery the following day.

Memories that I know are true (I don't have to ask parents if they are real or dream) are from about 2.