我几乎可以确定无疑地感到他的存在。

I most definitely feel that there is.

youdao

我几乎完全可以确定。

I'm as near certain as can be.

《牛津词典》

我研究了视频和它周围的环境，提出了一些为什么我推论这段视频几乎可以确定是一次恶作剧的原因。

I researched both the video and the circumstances surrounding it, and provided a list of reasons why I concluded that the videos were "almost certainly a hoax."

youdao