Like I said, I don’t have many memories from that age and none I would be 100% confident about in their accuracy.
That is not an answer. What sort of thing on that level of trauma happened to you when you were 7? Because, believe it or not, people remember traumatic things that happen to them at that age quite well. They spend years in therapy because of it.
There’s a difference between remembering something traumatic and remembering what happened at your birthday party.
Also, let’s say she isn’t “100% confident.” Let’s say she’s “70% confident.” Maybe still believe her.