That was a conjecture, not a fact.

那只是猜测，不是事实。

There are several conjectures.

存在着几种猜测。

The attitudes of others were matters of conjecture although there were plenty of rumours about how individuals had behaved.

尽管对个人的表现存在很多谣传，但他人的看法还只是一些猜测。

He conjectured that some individuals may be able to detect major calamities. [VERB that]

他猜测说有些人也许能够察觉重大灾难。

This may be true or partly true; we are all conjecturing here. [VERB]

这可能属实或者部分属实，我们都是在这儿揣测。