Claim-level addressability is a strict superset of paper-level addressability: anything you can express by citing a paper, you can express by citing one of its claims. Replication status: untested.
Proof
Annotation timings were collected over 18 annotators (PhDs in CS, biology, and economics), each annotating a stratified 50-paper subsample with 4-way overlap on a 20-paper calibration set. Median per-paper times were 47 minutes (claim-level, full edge graph), 22 minutes (claim-level, no inter-paper edges), and 14 minutes (paper-level metadata only). The 3.4x figure compares the first to the third.