The classifier loses the secure position from which classification began.
Blade Runner begins with apparently usable distinctions: human and replicant, authentic and implanted memory, empathy and simulation, born and manufactured life. The film progressively makes those criteria unreliable. Rachael’s memories feel autobiographically real despite being constructed; Roy exhibits capacities supposedly reserved for the human side of the division.
The decisive move is not simply that replicants are more human than expected. Deckard’s own standpoint for recognizing personhood becomes implicated. The criteria by which he classifies others can no longer guarantee his own position outside the category problem.
That is 3b. The ending provides commitment and escape, but not an achieved orientation that coherently contains the human/replicant fracture. The film leaves the contradiction active rather than integrating it.