examples

Example Proofs

Complete proof triplets generated by the proof-engine skill. Each example includes:

• proof.py — re-runnable proof script
• proof.md — reader-facing summary with verdict
• proof_audit.md — full verification details

Examples

Purchasing Power Decline

Claim: The purchasing power of the US dollar has declined by more than 90% since the Federal Reserve was established in 1913.

Verdict: PROVED (96.85% decline, margin of 6.85pp above threshold)

Demonstrates: Empirical numeric proof with two independent CPI sources, date extraction, cross-checks, and four adversarial challenges.

Cortical Plasticity

Claim: Critical periods of heightened cortical plasticity close permanently after early development, rendering the adult brain largely incapable of experience-dependent reorganization comparable to juvenile levels.

Verdict: DISPROVED (multiple sources document adult plasticity mechanisms)

Demonstrates: Qualitative scientific consensus proof with keyword extraction, multiple authoritative sources, and a DISPROVED verdict showing the skill can refute claims.

Running Examples

From the repo root:

# Run a proof
python docs/examples/purchasing-power-decline/proof.py

# Validate a proof (static analysis)
python proof-engine/skills/proof-engine/scripts/validate_proof.py docs/examples/purchasing-power-decline/proof.py

Note: Empirical proofs require the requests package (pip install requests) for live citation verification. If URLs are unreachable, the proof will still run but citations may show as unverified.