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We have expressed serious doubts of such a conclusion when interviewed to comment on this publication [2,3]. In the following comment, we would like to detail the reasons, based on experimental evidences obtained by us and by other groups worldwide that sustain our skepticism. We have identified two main flaws in this paper, as discussed in details below: the pressure is largely overes"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1702.07192","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.other","submitted_at":"2017-02-23T12:33:22Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"aeb7c94aa7b3c149052b4ca91147576c9002139c67385e58eaee5bd32057d9ba","abstract_canon_sha256":"067b82869dff2f9afe604d2c343525c7186e1726bdf68b2429aa2422e8cf8fea"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:50:07.923133Z","signature_b64":"JEvNlIyTx6Kf2Y29QZ0n2pJK0coPpx5WkFaQu+i7seGHYLDRmuSLb7vmvfeC9VXn+rKaJQjtAL/5EdcLOLJrAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b20c62244f8eb844b1584bcc2da0ce9682ec0f73c6414ef4dc02d5076317db76","last_reissued_at":"2026-05-18T00:50:07.922519Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:50:07.922519Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Comment on: Observation of the Wigner-Huntington transition to metallic hydrogen","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.other","authors_text":"Florent Occelli, Paul Dumas, Paul Loubeyre","submitted_at":"2017-02-23T12:33:22Z","abstract_excerpt":"In a recently published article [1], Ranga P. 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