By the “immediate” we do not mean a fusion of subject and object, but rather—more precisely—the sense, structure, and spontaneous arrangement of parts (cf. PP, 67). On the basis of the stimulus error, we can distinguish physical reality from the phenomenal world as correlate of perception; likewise, we can distinguish what we directly perceive through our body from physiological aspects, i.e., unnoticed internal processes. For Merleau-Ponty, “the properties of the phenomenal field” call for natural language, not formal languages (logical–mathematical), which remain at a distance from the lived world; otherwise, “it becomes impossible to reconstitute the descriptive content of perception, the actual view of the world, as an effect” (SB, 193).