onus probandi

2 English words descend from Latin onus probandi, most common first.

burden of proofThe duty of a party in a legal proceeding to prove an assertion of fact; it includes both the burden of production and the burden of persuasion; the onus probandi.
onus probandiThe burden of proof, the onus; the duty of a party in a legal proceeding to prove an assertion of fact; it includes both the burden of production and the burden of persuasion.

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