In my opinion, there are some authors bias. That he thought or reasoning of myself too. By that he is not willing to listen to other people's opinions or even listen to the words of others.
In my opinion, the author has a bias to an extent where he used ideas or use their own reasons, too. By which he did not accept the opinions of others, or even listen to the words of others.
In my opinion, the author has bias fair where he used ideas or use for their own reasons, too. He didn't listen to others' opinions, or even to listen to the words of others.