evidence boundary
unknowntheoretical
An evidence atom is an inspectable support unit. It is not a finding by itself; it supports or challenges a finding through review.
frontiers / frontier
Evidence atom
back to sourcesevidence boundary
unknownAn evidence atom is an inspectable support unit. It is not a finding by itself; it supports or challenges a finding through review.
finding binding
boundFine-structure constant variations at recombination face stringent local observational constraints (Δα/α < 5×10⁻⁴ at 95% CL for non-fine-tuned scalar field models) that conflict with CMB-inferred variations needed to resolve Hubble tension, rendering this mechanism generally astrophysically problematic despite theoretical interest.
inspect finding →
source binding
source-boundvs_05a7819aeab880f6
inspect source →
review context
unverified1 reviewable changes and 0 evaluation records target this atom or its bound objects.
Evidence statement
Fine-structure constant variations at recombination face stringent local observational constraints (Δα/α < 5×10⁻⁴ at 95% CL for non-fine-tuned scalar field models) that conflict with CMB-inferred variations needed to resolve Hubble tension, rendering this mechanism generally astrophysically problematic despite theoretical interest.
extraction method
manual_curation
support relation
unknown
condition refs
vcnd_581c8ccefbc7a776
Caveats
events
vev_831fb09a8539dcb8finding.assertedManual finding added to frontier state
reviewer:will-blair · 2026-05-29
reviewable changes
vpr_867b753076ee6960finding.addManual finding added to frontier state
applied · reviewer:will-blair · 2026-05-29
evaluations
No evaluation rows are attached.