So if someone told you that you were adopted or had brain surgery or were mauled by a lion during your first year of life, your response would be “So?”
The first two might give me pause to think, the third probably not, but for all three I would still have no memory of it and so would look at it in a philosophical light.
But I look so much like one of my grandfathers that it’s pretty certain the first one would never occur. Not that there’s anyone left at this late date who could make it occur were it even true.
Depends on what you mean by remember. There are lots of things about childhood that I can’t consciously recall, but the experiences undoubtedly add up to who I am today. I don’t remember my first steps, but I still know how to walk. I can’t look back at every instance in which I practiced multiplication tables, but I can still remember how to multiply. There are a lot of subtle things we absorb in our day-to-day life that we only take in subconsciously.
I recall an H. Beam Piper Paratime story that involved a world where reincarnation was a proven scientific fact. When a method of recalling past life memories at will was discovered, society collapsed into civil war, since suddenly everything older than a generation had multiple people claiming that it was theirs. Including inherited positions of power.
One’d be me and I’d be enjoying the sluggy life until I rolled another seven in the reincarnation game.
The other is just a slug.