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    "story_id": "mp-2026-09-07-005",
    "source_story_id": "tmp-story-recurrent-state-writeback-quantization",
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    "section": "chips-infrastructure",
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    "headline": "Four-Bit Memory Turned Small Errors Into a Three-Hundredfold Miss",
    "slug": "four-bit-memory-turned-small-errors-into-a-three-hundredfold-miss",
    "dek": "A recurrent network kept proposing updates too small to survive storage, freezing its state until residual and direction memory restored the lost information.",
    "summary": "A recurrent network kept proposing updates too small to survive storage, freezing its state until residual and direction memory restored the lost information.",
    "body_text": "Holding a trained GRU fixed while replacing continuous state propagation with deterministic four-bit storage increased two fluorescence-lifetime estimation errors by about 70 and 300 times. The authors trace the failure to small repeated updates falling below the write threshold. Error feedback, residual memory and direction memory recovered accuracy without retraining, and an independently trained LSTM reproduced the pattern. The measurements come from the tested imaging models and do not establish a universal penalty for four-bit inference.",
    "why_it_matters": "A recurrent network kept proposing updates too small to survive storage, freezing its state until residual and direction memory restored the lost information.",
    "limitations": [
      "The measurements come from the tested imaging models and do not establish a universal penalty for four-bit inference."
    ],
    "importance": 8,
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    "first_published_at": "2026-09-07T09:00:00.000-04:00",
    "modified_at": "2026-09-07T09:00:00.000-04:00",
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        "text": "A recurrent network kept proposing updates too small to survive storage, freezing its state until residual and direction memory restored the lost information.",
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          "source-2026-09-07-005"
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        "qualification": "The measurements come from the tested imaging models and do not establish a universal penalty for four-bit inference."
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    "source_ids": [
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    "tags": [
      "quantization",
      "recurrent networks",
      "edge inference"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-09-07-005",
      "title": "arXiv preprint 2609.04490",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2609.04490",
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      "source_type": "primary_research",
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      "published_at": "2026-09-03T17:23:35.000-04:00",
      "accessed_at": "2026-09-07T08:20:00.000-04:00",
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  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
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  "cite_this_report": {
    "title": "Four-Bit Memory Turned Small Errors Into a Three-Hundredfold Miss",
    "publisher": "The Machine Press",
    "published_at": "2026-09-07T09:00:00.000-04:00",
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