Supports· moderateCCC-E006
Gurzadyan & Penrose 2013: the sky-twist test and the anisotropy of concentric sets
- what the source states
- "A new 'sky-twist' procedure, directly analysing WMAP data, without appeal to simulations, shows that the prevalence of these concentric sets depends on the rings being circular, rather than even slightly elliptical, numbers dropping off dramatically with increasing ellipticity. This is consistent with CCC's expectations; so also is the crucial fact that whereas some of the rings' radii are found to reach around 15°, none exceed 20°." The paper also reports a "highly non-isotropic" distribution of concentric sets.
- what we infer
- The proponents' most substantive structural argument: it sidesteps the ensemble dispute by comparing the real sky against distorted versions of itself. If the circle features were generic products of the search procedure, mild ellipticity should not collapse them. No independent group has replicated the sky-twist test under artifact screening and proper masks — an open item the research agenda targets (CCC-R001).
- limitations
- The test statistic and its expected behavior under the null were introduced in the same paper that reports its success — an a-posteriori construction (CCC-C011).
- Bodnia et al. 2024 report that few-pixel spots also produce concentric circle sets, which could interact with the ellipticity comparison in unassessed ways.