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    "Result x is positive for real y when b > 0."
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    "Selected alias precedence: y then yInput; baseId then base; selected explicit preset/numeric base overrides b/baseInput; custom uses b then baseInput; absent base token uses b then baseInput. Nullish aliases fall through. Ignored shadow fields do not change the selected value.",
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    "Display precision is rounding only. Inverse uses unrounded x and is not independent verification; x rounded to1 cannot recover nonzero y. Conditioning depends on |y| nearbase1 and |y ln b| for exponent perturbations.",
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    "Extreme |y| may overflow (RESULT_OVERFLOW) or underflow (RESULT_UNDERFLOW)."
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