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.
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