On very-low-multiplicity data (e.g. EP_cs_01-24, mult ~1.4) the merge has too
few symmetry equivalents to measure the asymptotic I/sigma: both the (a, b)
error-model fit and the per-group strong-reflection scatter collapse toward
zero, so 1/error_model_b_asymptotic either explodes to an impossibly high ISa
(tiny positive b) or is left as 0. Real macromolecular data does not exceed
ISa ~50, so clamp the reported asymptote at a generous cap (ISa 100) and treat
anything past it as unmeasured (result.isa undetermined) rather than emitting a
spurious extreme. No-op for all well-measured data (b_asy well above the cap).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
leonarski_fandClaude Opus 4.8
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