Duration comparison · no historical date endpoint is assigned.
460 = 20 × 23
460 × 25/23 = 20 × 25 = 500
500 − 460 = 40
20 × 2 = 40
No dated endpoint or formal Mirror target is generated.
Full supporting table · File 13 §7.3: 460 → 500 and purification overlap · Luke 1:24–26, BSB: narrative context · Leviticus 12:4, BSB: purification context
The transformation is exact under 25/23; its application to purification is typological. Assigning a dated endpoint requires the input’s origin and counting convention. This diagram presents the canonical forty-unit gain without selecting an unverified historical conception-to-presentation date.