Answered against the pre-registration committed before the capture.
Units per second was the last open number on the PRESS (A) plate, and both
prior measurements of it were wall-clock readings off an emulator that runs
the guest slow by an unknown factor. They disagreed by 2.9x, because a 30 Hz
guest at full speed and a 60 Hz guest at half speed look identical on a wall
clock.
The ruler here is not a clock. ADV.wmv declares 30.0000 fps in its own ASF
header, so a decoded movie frame is a tick the emulator's speed cannot
stretch. Presented frames per decoded movie frame is guest_fps/30 with no
wall clock in the chain.
predicted H_A 30 fps -> 60 units/s -> 1.0
H_B 60 fps -> 120 units/s -> 2.0
measured 1.0000
Both pre-registered guards pass. Guard 2: a perfect repeating 3-buffer
cycle, 52 uses each (exactly 156/3), 2 chroma planes per luma on 156 of 156.
Guard 1: run lengths are 156 runs ALL of length 1 -- no smear, so the
dropped-movie-frame bias that would have pushed the answer toward 120 is
measurably absent rather than argued away.
So H_A. The port keeps its 60 and changes nothing.
REFUTES the live H3 hypothesis that 120 units/s explains the play-test's
late plate. That hypothesis was well-formed and attractive precisely because
it would have explained the complaint, which is why it needed a ruler that
is not a clock.
Which means finding 3 still has no cause. The strongest remaining candidate
is decoded rather than speculative: the plate's declared onset is t=214, not
t=236 -- a 22-unit fade, matching the T=22 the oracle confirmed by measuring
+23 alpha per presented frame on that element.
The pre-registered control could NOT be run: this logger build emits vb=
addresses, not vertex contents, so there was no alpha to check +34 against.
A weaker control is substituted and labelled -- the splash shader/blend
census, which validates the log's structure (what this measurement uses) and
not alpha extraction (which it does not).
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
5b04661248