What Is Disavowal?

The author describes disavow as things that are known but not allowed into this quote mental room, therefore critical bits of information do not affect the decision taken or change the course of action. We think we've assessed all these aspects that are potentially bad consequences for our bad decision and then we push them aside whereas denial is like, I, nothing's bad,nothing's bad, nothing bad is going to happen to me because nothing bad could happen. And that might be the difference.