So here's my attempt to make the question both a bit more precise, and a question that's an open question.

我正尝试,让这两个问题变得更准确,这是个开放性的问题

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you could leave your response to the invitation slightly open-ended by saying you're not sure.

你可以表示你不确定，开放性地回复这个邀请。

I don't know 课堂 - SpeakingMax英语口语达人

So this pattern is a little bit open-ended.

所以，这个句型是有点开放性的。

I wonder if 课堂 - SpeakingMax英语口语达人

The "I wonder" pattern is a bit open-ended,

I wonder”句型还具备一点开放性，

I wonder if 课堂 - SpeakingMax英语口语达人