I remember sitting on my dad's shoulders and looking at the babies in the maternity ward when my sister was born.
I even have an infancy memory: closing my eyes and crying, confused as to where the sound was coming from.
These are not things I was told about. They're pictures in my mind. I don't have a very strong episodic memory of that time, but I do remember things from well before age 3, and it pisses me off when scientists say "that just doesn't happen". It's like when my first grade teacher, a Ph.D. candidate in education at the time, told me I hadn't learned things I damn well had learned, like how to read.