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What Can You Find in the IPSC?
449,285 hadith (v3.4 deployed; v3.26 staged adds 8,241 more), each with a parsed chain, identified narrators, and a transparent grade. Here's what the data contains and how to access it.
Verify a Hadith
Search by text, collection, or number. See the parsed isnad, the grade, and the full provenance trail. Every grade traces to a specific narrator tier from a named scholarly source.
Try this in Theo →Trace a Narrator
37,046 narrators indexed, 27,118 with NRS reliability assessments. Look up any narrator to see their tier, the source of their assessment, their teacher-student connections, and every hadith they appear in.
Try this in Theo →Find Parallel Chains
52,938 bag-of-words clusters plus semantic clusters at thresholds 0.85–0.92 (v3.12 fresh-embedding rebuild) link the same teaching across all 86 collections. See how many independent chains carry a narration, its attestation level, and whether taqwiyah was applied.
Try this in Theo →Check a Grade's Provenance
Every grade is computed from: weakest narrator tier, chain continuity classification, defect cross-links, corroboration count, and documented grading rules. The autoGradeDetail field makes this fully auditable.
Try this in Theo →Search by Collection
Browse 86 classical works from the nine major collections to supplementary musnads, mu'jams, and fabrication-detection references. Filter by grade, narrator, or chain type.
Try this in Theo →Explore the Transmission Network
889,913 directed teacher-student edges mapping 1,400 years of hadith transmission. 7,973 narrator nodes with biographical data.
Try this in Theo →Access the corpus through Theo
Open Theo →Theo searches all four IPSC indexes — hadith, narrators, hidden defects, and matn clusters — and returns evidence with full citations.