我们没有书面证据就站不住脚。

Without written evidence, we don't have a leg to stand on.

《牛津词典》

如果，在没有“科学证据”的情况下，我们就不能令人信服地证明这些因素使人们幸福，那么我们在道德上就陷于不确定状态。

If we cannot make convincing cases for them without "scientific proof" that they make people happy, we are morally adrift.

youdao

“总有一些人说，如果你输钱较少，你就聪明过头了”，一位高管说，“(我们没有跟客户对赌的)证据就是我们也输钱了。”

"There are always people who will say that if you lose less money you are too clever," says one executive. "The proof [that we weren't betting against clients] is that we also lost money."

youdao