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Si-Kun Wang

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#artificial intelligence Preprint Sep 2026

EviGraph: Proof-Carrying Selective Recommendation over Temporal Public-Service Knowledge Graphs

EviGraph, which distinguishes critical decision requirements from information that can remain unresolved in a temporal knowledge graph, is introduced, suggesting that reliable evidence-based navigation depends on specifying what must be established for a decision, rather than simply adding more verification.

Yi-Xi Zhou, Si-Kun Wang, Lei Fan et al. · 0 citations
Preprint Sep 2026

A Historical Corpus Is Not a Historical System: Auditing Hindsight Leakage in Stateful Data Discovery

Offline replay should estimate what a discovery system could retrieve at a historical point, yet freezing the corpus leaves interaction memory unconstrained. We formalize point-in-time (PIT) discovery through historical state $(D_t, \theta_t, M_{<i})$ and introduce a paired replay that changes only memory availability....

Yi-Xi Zhou, Fan Zhang, Si-Kun Wang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

GraphEcho: Structural Redundancy and Evidence Provenance in LLM Graph Agents

A large language model (LLM) agent can follow more graph paths without acquiring more independent evidence. GraphEcho tests whether agents mistake these repeated encounters for additional corroboration. The benchmark varies path counts and evidential origins while holding evidence content fixed, and evaluates both judg...

Si-Kun Wang, Yi-Xi Zhou, Lei Fan et al. · 1 citation

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