我看了他一眼，他的态度之真诚是一丝一毫不可怀疑的。

I looked at him, and had not the slightest doubt he was sincere.

youdao

笛卡尔在反经院哲学的斗争中力图用科学或数学方法为原型构建不可怀疑的、具有确定性的哲学体系。

In the struggle against the scholastic philosophy, Descartes want to use science and mathematics method as the prototype, for constructing a new philosophy system which has no doubt.

youdao

当你处于接受状态时，提出自己的问题，并接受来自直觉的任何信息，要持有开明的态度，切不可怀疑，妄自推测或分析。

When in a state of receptivity, ask your question and receive messages from your intuition as they come, with openness, without doubt, and without interpretation or analysis.

youdao

And So, Descartes used the method of doubt to say there's something really different about having a body that's always uncertain, from having a mind.

因此,笛卡尔运用怀疑方法得出,与拥有不可确定的身体不同,拥有心理是肯定的

耶鲁公开课 - 心理学导论课程节选