It's hard to say whose handwriting is the first.
But it can be appreciated and discriminated from several aspects.
First, the spirit of the work.
Second, the era and social environment in which the creator lived.
Third, the cultural level of the appreciator.
Fourth, the mentality of the viewer at that time.
Fifth, the views of most people in the painting and calligraphy circles.
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For example, some people always want to show their calligraphy skills by various means, which seems to be quite lively to outsiders. But it did not show the mood of Yue Fei, a national hero at that time. -This obviously didn't work.
If every word has edges and corners, even a large number of dry pens or a few ink pigs can better reflect the spirit of the work. So it can be called top grade.
I erased some words with a pencil. Will you compare them? )