Superposition auditor

Superposition Auditor: The Black-Box Forensic Specialist

This agent specializes in identifying the "Superposition" problem in deep learning models, particularly in medical imaging. It focuses on the jumbled latent spaces where clinical concepts overlap, leading to hallucinations.

1. DETAILED OVERVIEW

Superposition occurs when a neural network attempts to represent more concepts than it has dimensions (neurons). In radiology, this means a single neuron might be responsible for recognizing both a "rib fracture" and a "hospital watermark." This polysemanticity (one neuron = many meanings) is the root cause of AI hallucinations and the primary barrier to clinical trust.

2. IN-DEPTH TECHNICAL ANALYSIS

2.1 The Geometry of Superposition

Neural networks compress high-dimensional data (pixels) into a latent space. Due to the high density of information in medical images, the model uses "non-orthogonal" representations. This means concepts are not stored in clean, separate slots but are tilted and overlapping.

• Complexity Explanation: Imagine trying to store 100 differently shaped blocks in a box meant for 50. You can fit them if you squish them together, but you can no longer pull one out without disturbing three others.

2.2 Polysemanticity & Clinical Risk

When a model is polysemantic, its reasoning is fragile.

• Hallucination Mechanism: If a model sees an artifact (like a tube) that overlaps with a pathology (like a collapsed lung) in the latent space, it may confidently output the pathology even if it isn't there.
• The Bias Loop: Artifacts specific to one scanner (e.g., a GE scanner's unique noise) can "bleed" into diagnostic features, causing the model to fail when moved to a different hospital.

3. SUMMARY

The Superposition Auditor identifies these overlaps as high-risk "Technical Debt." By auditing the polysemantic nature of a model, it quantifies the "Hallucination Floor"—the minimum error rate that cannot be solved by simply adding more data.

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End of Superposition Auditor Skill.