Any meaningful concept of 'transcendent object' or 'real object outside of consciousness' must be constitutable through actual or possible experience.

Ingarden takes Husserl to have been driven to transcendental idealism largely by his epistemological goals and transcendental approach to phenomenology. If the very idea of three-dimensional external objects makes sense, it would be essential that our perceptions of them are inevitably inadequate: They may be presented from one point of view or another, but never exhaustively and entirely -- so room is always left open for new perceptions that would lead us to entirely revise our past judgments.