The port challenged two statements of mine as mutually inconsistent and
refused to guess which I meant. They were right to. Answering with the
clock-free quantity they proposed:
(onset - title start) / (plate - title start) = 0.489 / 0.507 (3.7% apart)
So the onset is at the MIDPOINT. That refutes the port's implemented 0.2 and
my own summary's "shortly before the plate" (~0.85) alike.
Root cause of my error: the ratio measurement was right, but I converted it
to title units through the plate's declared 12-unit ramp and wrote the
summary from the conversion. That calibration makes title-start..plate 75
units where the data declares the plate at t=238 -- 3.2x out, not the 1.75x
this page reported. All title-unit figures withdrawn; the ratios never
needed a clock.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
4d84396de0