However, it is based on scientific speculation, not certainty.

然而，它却是基于科学猜测，并非出于定论。

youdao

When no one can be quite sure what is underwritten and what is not, certainty is not achieved, but the costs may be very large.

对于谁得到了担保、谁没得到担保，当没人心里有数的时候，就不会有确定性，而成本可能很大。

youdao

But this insurance policy is going to cover the farm inputs that we use in the farms, so that is going to give us the certainty of going back to the farms again if the rains do not come."

VOA: special.2010.05.11

Milton had begun the sentence not with calm, prophetic certainty about his divine vocation. He began it with a far more secular set of images, a set of images that comes from the world of business.

弥尔顿并不是以一种先知对他天职，的冷静确信开始写的，他以,更世俗的比喻开始,生意上的比喻。

耶鲁公开课 - 弥尔顿课程节选

And our third example touches on not when you are expressing a level of certainty,

接下来的第三个例句并不是用于表示某种程度的肯定，

I'm sure 课堂 - SpeakingMax英语口语达人

Or GE at around the same time: If that is not certainty in the investment world, what is?? GE: huge and with a very high rating.

FORBES: War Lessons for Investors I: Accept the Fog of Investing

The government in Male wants more Indian tourists and investors, and promises stability if not political certainty.

ECONOMIST: Rival leaders bicker, and vie for help from India

In their Friday-night spinathon, Microsoft's legal experts hastened to point out that this conclusion is not a certainty.

CNN: ASIANOW - TIME Asia | Cover: 'Microsoft Enjoys Monopoly Power...'