Two-valuedness against measurement

Proof

Each claim with the measurement that settles it, the number, its uncertainty, the source with its DOI, and the line of the reproduction script that recomputes it. A claim missing any of the five is not listed.

Run python3 -I reproduce/reproduce.py in the site folder; each claim id below is a line of its output (expected output). All DOIs resolve (checked against Crossref, 2026-11-07).

P01. The two-valued wave returns after 720 degrees of rotation, not 360.

Measurement
Neutron interferometer, precession angle at which the interference returns (Rauch et al. 1978)
Number
716.8 deg
Uncertainty
3.8 deg (1 sigma)
Source
doi:10.1007/BF01321193
Recomputed
z from 720: -0.84; z from 360: +93.9 (reproduce.py, line P01)

P02. No pair of preset answers carried by the two ends reproduces the Bell correlations.

Measurement
CHSH number S, photon pairs (Aspect, Grangier, Roger 1982)
Number
S = 2.697
Uncertainty
0.015 (1 sigma)
Source
doi:10.1103/PhysRevLett.49.91
Recomputed
46.5 sigma above the preset-answer limit 2 (reproduce.py, line P02)

P03. The same holds with the detection and locality loopholes closed together.

Measurement
CHSH number S, electron spins 1.3 km apart (Hensen et al. 2015)
Number
S = 2.42
Uncertainty
0.20 (1 sigma)
Source
doi:10.1038/nature15759
Recomputed
2.1 sigma above 2 (reproduce.py, line P03)

P04. The correlation survives over 1,203 km; it is not tied to places.

Measurement
CHSH number S, satellite to two ground stations (Yin et al. 2017)
Number
S = 2.37
Uncertainty
0.09 (1 sigma)
Source
doi:10.1126/science.aan3211
Recomputed
4.1 sigma above 2 (reproduce.py, line P04)

P05. No large fourth spatial direction is open to gravity at laboratory range.

Measurement
Torsion balance, inverse-square law (Lee et al. 2020)
Number
Yukawa range of gravitational strength < 38.6 um
Uncertainty
95 % confidence bound
Source
doi:10.1103/PhysRevLett.124.101101
Recomputed
a three-direction inverse square predicts no deviation: inside the bound (reproduce.py, line P05)

P06. No small curled direction shows its tower of heavy copies, in the models searched.

Measurement
High-mass diphoton events at 13 TeV (CMS 2018)
Number
first Randall-Sundrum graviton > 2.3 to 4.6 TeV
Uncertainty
95 % confidence bound (couplings 0.01 to 0.2)
Source
doi:10.1103/PhysRevD.98.092001
Recomputed
no excitation seen: a fixed mass inside the range is excluded (reproduce.py, line P06)

P07. A clock's rate follows the gravitational potential exactly (redshift coefficient alpha = 0).

Measurement
Clock comparisons: Pound and Snider 1965, Gravity Probe A 1980, Galileo 5 and 6 (Delva et al. 2018), combined
Number
alpha = 1.68e-06
Uncertainty
2.34e-05 (1 sigma)
Source
doi:10.1103/PhysRevLett.121.231101
Recomputed
combined +0.07 sigma from 0; chi2 = 0.0232, p = 0.999 (reproduce.py, line P07)

P08. Light past the Sun bends by the full amount (gamma = 1); the clock-rate half alone is contradicted.

Measurement
Cassini Shapiro delay (Bertotti et al. 2003) with geodetic VLBI (Lambert and Le Poncin-Lafitte 2011)
Number
gamma - 1 = 1.74e-05
Uncertainty
2.26e-05 (1 sigma)
Source
doi:10.1038/nature01997
Recomputed
full bending +0.77 sigma; half bending +44270 sigma (reproduce.py, line P08)

P09. A moving clock runs slow by the time-dilation factor, at 10^18 g of acceleration.

Measurement
Muon lifetimes in the CERN storage ring (Bailey et al. 1977)
Number
64.368 and 64.419 us
Uncertainty
0.029 and 0.058 us, plus the common gamma error
Source
doi:10.1038/268301a0
Recomputed
against 64.4309 us: residuals [-0.14, -0.94] (reproduce.py, line P09)

P10. Flown clocks gain and lose exactly as gravity and speed predict.

Measurement
Atomic clocks flown round the world (Hafele and Keating 1972)
Number
east -59 ns, west +273 ns
Uncertainty
10 ns and 7 ns (1 sigma)
Source
doi:10.1126/science.177.4044.168
Recomputed
residuals against the flight-log predictions [-0.76, -0.09] (reproduce.py, line P10)

P11. Antimatter falls; it does not rise.

Measurement
Antihydrogen in a vertical trap (ALPHA-g, Anderson et al. 2023)
Number
0.75 g
Uncertainty
0.21 g (1 sigma, statistical and simulation in quadrature)
Source
doi:10.1038/s41586-023-06527-1
Recomputed
falls at 1 g: -1.21 sigma; rises at -1 g: +8.5 sigma (reproduce.py, line P11)

P12. A spinning Earth drags the gyroscopes; a static, rotation-free gravity map is contradicted.

Measurement
Gravity Probe B frame-dragging drift (Everitt et al. 2011)
Number
37.2 mas/yr
Uncertainty
7.2 mas/yr (1 sigma)
Source
doi:10.1103/PhysRevLett.106.221101
Recomputed
no rotation term predicts 0: +5.17 sigma (reproduce.py, line P12)

P13. Mercury's perihelion advance matches general relativity (beta = 1).

Measurement
Ranging to MESSENGER, PPN beta with Cassini gamma (Park et al. 2017)
Number
beta - 1 = -2.7e-5
Uncertainty
3.9e-5 (1 sigma)
Source
doi:10.3847/1538-3881/aa5be2
Recomputed
beta = 1: -0.69 sigma (reproduce.py, line P13)

P14. Integer energy levels alone do not give hydrogen's 1S-2S interval; the QED shifts are needed.

Measurement
Hydrogen 1S-2S two-photon spectroscopy (Parthey et al. 2011)
Number
2 466 061 413 187 035 Hz
Uncertainty
10 Hz (1 sigma)
Source
doi:10.1103/PhysRevLett.107.203001
Recomputed
Bohr ladder misses by 2.299e+10 Hz; Dirac levels by -7.106e+09 Hz (reproduce.py, line P14)

P15. All bodies fall alike (titanium and platinum).

Measurement
MICROSCOPE satellite, Eotvos parameter (Touboul et al. 2022)
Number
eta = -1.5e-15
Uncertainty
2.7e-15 (1 sigma)
Source
doi:10.1103/PhysRevLett.129.121102
Recomputed
universal free fall predicts 0: -0.56 sigma (reproduce.py, line P15)

P16. The double pulsar loses orbital energy to gravitational waves at the predicted rate.

Measurement
Double pulsar J0737-3039 orbital decay, observed over predicted (Kramer et al. 2021)
Number
0.999963
Uncertainty
6.3e-5 (1 sigma)
Source
doi:10.1103/PhysRevX.11.041050
Recomputed
ratio 1: -0.59 sigma (reproduce.py, line P16)

P17. Clocks one millimetre apart in height tick at different rates, by g/c^2 per metre.

Measurement
Strontium lattice clock, rate gradient across the sample (Bothwell et al. 2022)
Number
9.8e-20 per mm
Uncertainty
2.3e-20 per mm (1 sigma)
Source
doi:10.1038/s41586-021-04349-7
Recomputed
against 1.09e-19 per mm: -0.48 sigma (reproduce.py, line P17)

P18. Light leaving the Sun is redshifted by the potential difference to Earth.

Measurement
Solar spectrum via Moon light, HARPS laser comb (Gonzalez Hernandez et al. 2020)
Number
638 m/s
Uncertainty
6 m/s (1 sigma)
Source
doi:10.1051/0004-6361/202038937
Recomputed
against 633.1 m/s: +0.81 sigma (reproduce.py, line P18)

Scope: each claim is stated as the measurement allows, within the quoted confidence and the models named; a bound is a bound, not a value.