A weakness of the cognitive explanation of depression?

-Its only a partial explanation -Seems to be no doubt that depression can triggered by life events that Ellis calls 'activating events'. Such cases are sometimes called reactive depression. -However, there are many casses of depression that is not traceable to life events and it is not obvious what leads the person to become depressed as a specific time. This called endogenous depression -Therefore Ellis' ABC model is better for explaining some cases of depression, mainly reactive depression, and can't be applied to all cases