https://ar5iv.labs.arxiv.org/html/1901.02286
Authors. Gros, C
Venue. arXiv:1901.02286 , rendered preprint
How the Institute flags it
frontier 1 time speculative 1 time
This source carries more than one flag across the corpus. That is not an inconsistency to resolve: the same work can be established evidence for one claim and frontier evidence for another, and the flag belongs to the use rather than to the source.