I often see parents who see their child as stong willed.   There is a distinct difference between the strong will child vs the child who has pushed back authority.    From my 30 years experience I believe most children push back authority.   How does that look?   The parent starts to take action and the child raises the anty.   It will be a fit, reation,  or some type of resistance that is big enough that the parent surrenders.   Once a child figures out that s/he only needs to go to the next level of acting out…   tada… the parent is trained.   That is pushing back authority.