Of course...when I said human beings I meant 'all' human beings. It's curious though that you feel compelled to ask the question as if you're making some kind of profound point.
No more profound than your point. Which I guess is that we can't trust anything anyone says, which applies to both sides of every question, which means your post doesn't mean anything because we can't trust it ?
Or do you trust things you're disposed to believe in, and call into question the motivations of anyone who says something you don't want to be true ?
What kind of critical thinking would you call that ?