Direct perception, inference, and competent evidence are proofs.

直接认知，推理加上足够的证据就构成了正知。

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Most people are competent to give evidence.

多数人都有资格提供证据。

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However, in such case, the Sellers shall submit to the Buyers a certificate issued by the China Council for the Promotion of International Trade or competent organizations as evidence thereof.

然而，在此情况下，卖方应向买方提交由中国国际贸易促进委员会或相关组织签发的证书作为证据。

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Despite evidence he suffered psychosis and hallucinations, he was found competent to be tried as an adult.

BBC: Smirking teenager jailed for Ohio school shooting

"Our review of the evidence available to us shows that the firm acted in a professional, competent and ethical manner in its work on behalf of Refco, " the statement said.

FORBES: Magazine Article