Mínshì sùsòng cǎiyòng gàiránxìng zhàn yōu de zhèngmíng biāozhǔn.
Civil litigation uses a 'balance of probabilities' standard of proof.
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Formal academic/legal term. In everyday speech use 可能性 (possibility) or 概率 (probability). 盖然性 mostly appears in philosophy, logic, and Chinese legal writing on evidence standards.