CONCEPT
Temporal Thickness
The saturation of the living present with retention (the just-past) and protention (the about-to-come) — the thick, layered structure of embodied time that computational systems, processing tokens in sequence, structurally lack.
Temporal thickness names the constitutive feature of embodied consciousness that Merleau-Ponty identified in his analysis of time: the present is not a durationless instant but a thick field, saturated with the just-past (retention) and the about-to-come (protention), experienced bodily as the felt continuity of an organism that remembers with its muscles and anticipates with its posture. This structure is not a cognitive operation performed on the present moment — it is the present moment, as lived by a body-subject always already in motion, always already shaped by where it has been and oriented toward where it is going. For AI systems, which process tokens sequentially through context windows, temporal thickness is structurally absent. The context window functions as a form of computational memory, but it is not temporal in Merleau-Ponty's sense — it is a data structure, not an experience.
In The You On AI Field Guide
The analysis of time consumed the most demanding chapters of Phenomenology of Perception