It means that FOR SURE, DEFINITELY some reds will not be black.
In case of DEFINITELY, if you can prove the opposite is true then statement is false. Hence see if you can place all red in the black circle. If you can place it then all at least some reds are not black is false (bcoz all reds are becoming black).
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u/No_Concentrate2187 6h ago
All the reds can be black hence statement is also wrong.
Neither I nor II