Hi CB,
I agree with your general interpretation of meaning.
The reason I didn't discuss meaning was that the question was simply Which of the following sentences are correct? I just chose to give the simple answer that they were all correct, which is true. Sometimes I'll go further, and sometimes I won't for various reasons.
Personally, I like it better when people ask slightly more specific questions, eg
Do these sentences all mean the same?
Is this correct grammar?
Do these sentences all sound natural?
As a general comment, and I'm not talking about this specific thread, I find that many sentences queried on the Forum are correct but would never be said, or only be said in contexts and circumstances that are odd to say the least. Such things commonly require a lot of effort and words to explain, and I often feel that the explanation is liable to do nothing but confuse the learner and muddy their clear understanding of the topic. I'd welcome any thoughts you have on how to handle matters like these. ![Smile [:)]](/emoticons/emotion-1.gif)
Best wishes, Clive