{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"2463fa1b4fe2f915da232e6bc23aae2c2903146cc2dd2f253b0db55358f6ccc8","created":"2026-10-03T07:18:02Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"b3382239a3a311634d020e9b9359ee1ec9b0efd26caf12538f1ac00042631f4e","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"cosmo.inflation.did-inflation-happen","kind":"phenomenon","literature_status":"open","n":"1","parents":[],"plain":"Inflation explains the observed pattern of tiny density ripples well, but other histories can mimic parts of it. A decisive test would separate inflation from all alternatives.","posed_since":"","precise":"Establish or refute an inflationary epoch by a signature that alternatives cannot reproduce, such as a nearly scale-invariant primordial tensor spectrum with tilt $n_t = -r/8$ (single-field consistency relation); refutation requires a demonstration that a non-inflationary model reproduces all CMB and large-scale-structure data including any detected tensor modes. For r below $\\sim 0.01$ the consistency relation cannot be measured, and a yes answer then requires a detected tensor spectrum with amplitude and scale dependence that non-inflationary models are shown unable to produce.","problem_ref":null,"references":"","settled_by":"Detection of primordial B-mode polarization with measured amplitude and tilt consistent with inflation, or an alternative model fitting the same data.","status_note":"","title":"Did the early universe go through an inflationary phase?","topic_ref":"690ffa5b73447ba4221a7c006ebf0c4bb3c77c97b6f540e1aa6bb7a20d15d99b"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"dc234507b7a27d76c5acfb538607a35e63ce34bfbbbc5009da3ce2d1efe09669","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"d2aef07f7fcd3cb8abe26373189b6c486045364d49ed1bcd4dc4fd42e26130b7","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"hmwAYeFQvul1_nG2KN85eOnQPIoQ0MS3vArU0ljlWv0-r98eBG2gsmkUfm4ytDQgJ3NV8BC0Sr2Nbo1AW_YGAg"},"schema":"pubphys.envelope/1"},"record_hash":"dc234507b7a27d76c5acfb538607a35e63ce34bfbbbc5009da3ce2d1efe09669","leaf_index":1261}