If the transcendental ego is the source of all sense, then all meanings — including the meaning of 'transcendent object' — must be constituted through the acts of that ego.

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.