1: There is a group of people like this
Mr. A. thinks, "We're all part of a community!" he thinks.
Mr. B sees "A, B, and C are the regular core members and the rest are guests".
Mr. C thinks, "Mr. F must be one of us."
Mr. D thinks he is a "regular core member like A, B, and C" (but neither B nor C think so).
Mr. E. thinks "I only attended an event once, I don't belong to the community."
Mr. F thinks "I just attended the event with my friend Mr. C. I didn't join Mr. A's community."
2: These various individual feelings of belonging to different communities overlap to form a "somewhat colorful, boundary-blurring group".
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