RERUN
Claim 37

Receipt for run 1: the Lab's permanent record of what it did

Do parents of two boys or two girls try for a third child more often?

RERUNCLAIM #0037

Do parents of two boys or two girls try for a third child more often?

Measured in
share of families, 0 to 1
Paper says
0.068
Counts if
0.063 to 0.073
Lab got
0.0675
VerdictNumbers check out
3a87812133ada0a5f6a7Nov 12, 2026

Paper said 0.068. We got 0.0675.

The code and data produced the same result. That doesn't prove the study's method is right.

Check this yourself

You don't have to trust us or the . With Docker and Node installed, this retraces the claim on your own computer and compares the number:

git clone <this repository> && cd rerun && pnpm install && pnpm sandbox:build
pnpm verify-claim 37

How much evidence is behind this?

Each step is a tougher test. Only the first one decides who wins the market.

  1. 1. ✓

    The Lab's retrace of the code and data named in the claim

    The Lab retraced the code and data and got a number inside the claim's range. YES wins.

  2. 2. –

    Stress test: does the number depend on luck?

    Fetching the extra runs…

  3. 3. –

    Rebuilt from the description (experimental)

    Fetching the AI's rebuild…

Coming next: a data-leakage check, for the same rows in training and test data, and a maths check on the statistics a paper reports. Neither has run on this claim.

Even all three steps can't prove the science is true. They show how well this result stands up to checking.

Verified

Your browser just re-checked these itself, so you don't have to trust this site.

Checking…

The write-up

The write-up isn't available right now. Its fingerprint is below.

The full record (technical)

✓ Verified on NEAR. See the contract's history

Outcome
REPRODUCED
3a87812133ada0a5f6a7b1cf3ad2a15907d1945b8fdbe683e392903c02a9e5c3
Commit
6b8ba2d5f26fdf4837a71dfffb43b175586424d3
Data fingerprints
ca9be592b79dddbc2f49ff80f45d0dbe31aac4afb57ff88dec57376c3f3e3452
Software versions fingerprint
8dab88328537f15c219ff04f4c55b0150f9867347067f4b5868ed8b0769249af
Runtime
2s, exit code 0
Started, finished
11/12/2026, 2:00:05 PM, 11/12/2026, 2:00:41 PM
Lab
rerun-tee-lab-43f5f2.testnet
Lab code fingerprint
f55158196d6c82ae0b9d2d8f1ef7d9cefb0f1d3fef2a2b3ea8cce647197e775a
AI used
z-ai/glm-5.3-flash
f4b12e140771b6ab48ef696b938ac393a6b4ce4681a97e599c1393b38335289e
Signed AI replies
9fc0c6bf250a4a2387861b5c9d77017c
Log fingerprint
65836278c520769f235cdc0be9d1ca13daf77fcb8c74796b2f6c46c3ddef0d6a
Write-up fingerprint
372d0a20f89a5f4c180e259bd50a1ec0551058cb80c59643cf2438663d9014be
Show the end of the run log
women 254654
same sex 128745 had another child 0.414
one boy, one girl 125909 had another child 0.3464
same_sex_difference 0.0675