[aw1621107]

> Therefore, any number they give is wrong.

This is an incorrect conclusion to draw. Twitter states that they estimate that a certain percentage of a subset of users is spam/false accounts. That they don't know the percentage of spam/false accounts outside of that subset of users has no bearing on the accuracy of their statement regarding their chosen subset.

As a greatly reduced example, I can say that neither the @elonmusk nor the @chancery_daily accounts are spam accounts. I have no idea how many accounts Twitter has, let alone how many of those are spam accounts, but that lack of knowledge does not affect the accuracy of my first statement.