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The Polylog AI Intelligence Brief

Morning Edition · Monday, June 29, 2026

A New Paper Argues Prompt Injection Cannot Be Fully Defended in Today's Architectures

Researchers offer a proof that models which share one embedding space for instructions and data lack the separation any robust defense would require.

A New Paper Argues Prompt Injection Cannot Be Fully Defended in Today's Architectures

A paper posted to arXiv, On the Inseparability of Instructions and Data in Shared-Embedding Sequence Models, takes up what its authors call the top security risk for applications built on large language models. Every prompt-injection defens…

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Oversight and Evaluation Lag Accelerating AI Capabilities

Over the next 3-6 months, evidence mounts that governance, evaluation, and agent-safety methods are failing to keep pace with capability growth, driving investment in interpretability, agent-manipulation benchmarks, and institutional-reform proposals.