Edit (addition that the forum software won't let me put in a separate post): You've posted some very nice examples of space variations, Marco.
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My main point:
Based on my observations so far (which are ongoing and still tentative), I think you may find that the difference between a "dubious space" and a "space" is not one of physical distance, but one of content.
And a question to moderators... Why does the software combine two different posts that are responses to two different people on two different subjects into the same post? It's very disconcerting for the poster, confusing to readers, and inconvenient for those who want to specifically respond to one or the other (or specifically "thank" one or the other), not both.
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My main point:
Based on my observations so far (which are ongoing and still tentative), I think you may find that the difference between a "dubious space" and a "space" is not one of physical distance, but one of content.
And a question to moderators... Why does the software combine two different posts that are responses to two different people on two different subjects into the same post? It's very disconcerting for the poster, confusing to readers, and inconvenient for those who want to specifically respond to one or the other (or specifically "thank" one or the other), not both.