A lot of it is anticipation and retrospection and it goes by a pluralist and modal logic, but it is this way because of its relation to the limit case which is the actuality of the ever-renewed present event whose logic is two-valued and hard and inexorably consistent within its fullest extension. You know the distinguishing quality of the actual but can never describe or exhaust it. The reality always differs from expectation in unexpected but consistent ways and this is the source of objectivity. This consistency is so different from the enveloping mass of subjectivity that it needs explanation and the external mind-independent existence of the world is taken as the most economic explanation. Even if the presumption of an external reality beyond the mind is withdrawn, the consistency alone is sufficient to fulfill this role, and you can say it belongs to a larger mind, minds in general having the capacity to project a transcendent frame, but the end result is little different from simple mind-independent stuff. It is the nature, the phenomenon, of actuality that is important and not any theory of it. The only use of idealism, then, is to maintain focus on the mysterious nature of the actual by refusing metaphysics.