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According to us, the staccato dots under E in the L.H. that appear in the sources in b. 17 and 21 are enough to confirm the composer's intention concerning their presence. The dots are in both bars in A1 and in b. 21 in GE, which means that Chopin wrote them in the autographs in at least three out of four cases (the fourth could have been written indistinctly in [A2], just like both dots in A1, which are also indistinct).
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category imprint: Differences between sources
notation: Articulation, Accents, Hairpins