has directly or indirectly referenced the thing, that you are condensing into a single statement.

直接或间接地表达着一件事情，而你要把这些内容概括成一句话。

It sounds like 课堂 - SpeakingMax英语口语达人

Either that you are certain of something, that you are not certain of something,

一种是表达你对某件事情很有把握或者并没有什么把握，

I'm sure 课堂 - SpeakingMax英语口语达人