Why do some people write factually incorrect comments on here?

One time a person I saw a person write period and menstruation doesn’t mean the same thing.

It does mean the same thing. I thought this was well known. https://www.mayoclinic.org/healthy-lifestyle/womens-health/in-depth/menstrual-cycle/art-20047186

https://en.m.wikipedia.org/wiki/Menstruation


https://my.clevelandclinic.org/health/articles/10132-menstrual-cycle

Why do some people write factually incorrect comments on here?
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