Why does my 15 y/o friend not remember anything before she was 11?

I asked her about her sats results in year 6 and I explained what they were but she couldn’t remember doing them even though everyone did them cos the whole country does. Then she said she doesn’t remember ANYTHING before year 7(11-12 y/o) except people. Is this normal? I’ve never known someone to have such a bad... show more I asked her about her sats results in year 6 and I explained what they were but she couldn’t remember doing them even though everyone did them cos the whole country does. Then she said she doesn’t remember ANYTHING before year 7(11-12 y/o) except people.
Is this normal? I’ve never known someone to have such a bad memory. My 86 y/o grandma remembers more than that.
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