And you know it's not the necessarily a good idea to do it, you start with "The thing is".

你心里清楚这么做并不一定是个好主意，你就可以用“The thing is”来回答他们。

The thing is 课堂 - SpeakingMax英语口语达人

You could say "I wonder if" and mean you don't think.

你可以用“I wonder if”来表达你并不这么认为。

I wonder if 课堂 - SpeakingMax英语口语达人