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How a bout this for all levels:
lis = {{{1, 2}, {3}, {4, 5, {5}}}, {{6}, {}, {}}, {{}, {{}, {}}}, {{}, {}, {2}}}; Select[lis , #/# =!= # || # =!= # + # &] // Quiet (* {{{1, 2}, {3}, {4, 5, {5}}}, {{6}, {}, {}}, {{}, {}, {2}}} *)
How a bout this:
lis = {{{1, 2}, {3}, {4, 5}}, {{6}, {}}, {{}, {}}, {{}, {}, {2}}}; Select[lis , #/# =!= # || # =!= # + # &] // Quiet (* {{{1, 2}, {3}, {4, 5}}, {{6}, {}}, {{}, {}, {2}}} *)
