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AI Verification & Validation

2 summarised stories about AI Verification & Validation, each linking back to the original source. Browse all topics →

Thursday, 16 July 2026

Verifier-Guided Twelve-Tone Composition: A Generate-Verify-Repair Harness for Symbolic Music Generation

arXiv cs.AI 18 hours ago

Researchers developed a neuro-symbolic verification system that wraps language models to generate valid twelve-tone musical compositions, checking outputs against formal constraints before delivery. The system improved constraint-checked delivery from 13.3% to 48.1% across 40 controlled tasks with four paired models, with the harness abstaining on 51.9% of runs that failed verification. Expert evaluation showed preference for the harness-generated compositions over raw model output in adherence, perceived legality, and overall musical quality.

Partially Correlated Verifier Cascades in LLM Harnesses: Concave Log-Odds, Polynomial Reliability, and Blind-Spot Ceilings

arXiv cs.AI 18 hours ago

Researchers developed a mathematical theory for partially correlated verifier cascades in large language models, showing that when multiple verifiers check an answer, the posterior log-odds grow concavely rather than linearly in the number of verifiers. For Beta-distributed latent variables, failure decays polynomially as k^(-b) rather than exponentially, and a blind-spot ceiling at mass 1-π prevents reliability from saturating below 1. Independence-based models underestimate failure by 20x at k=5 and 3000x at k=10, indicating that improving reliability requires decorrelating verifiers through different model families or evidence sources rather than simply adding more gates.