How do you know that? Do you know what it's like to be me?
I have greater epistemic authority over what I know than others.
Sigh. Thinking you know and knowing is not the same, especially thinking you "objectively" know something. Maybe you should read the article posted instead of commenting these sorts of sentences.
If this frustrates you, then congratulations; we have a starting point for discussion. Be open to describing where that frustration originates.