In court you would say there was some circumstantial evidence for it, but no proof.

在法庭上你只能说有它存在的一些旁证，但没有足以一锤定音的证据。

youdao

This so-called proof is mere assumption based on circumstantial evidence.

这种所谓的证据仅仅是建立在间接证据的假设。

youdao

Edgett and his team conceded the images were only circumstantial evidence, not proof.

CNN: Life on Mars?

But those close to the project say that with or without conclusive DNA proof, the circumstantial evidence alone is striking.

CNN: STORY HIGHLIGHTS

Concrete proof is scarce, but circumstantial evidence is accumulating.

CNN: ASIANOW - TIME Asia | Cover: Raging Inferno