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It is shown that the anomalously low-lying Roper states cannot be assigned aspentaquarks with the scalar diquark - scalar diquark - antiquark structure assuggested by Jaffe and Wilczek.Comment: Will appear in Phys. Rev. Lett. as a comment on the paper by R. Jaffe  and F. Wilczek, Phys. Rev. Lett., 91, 232003 (2003

Can Low-Lying Roper States be Explained as Antidecuplet Members?