Assume that $(q_{j})_{{j}=1,\ldots,n}$ , $n\leq 8$ are points in ${\mathbb{P}}^{2}$ . The points $(q_{j})_{j}$ are in general position if and only if

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  All points are different.

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  No three points lie on a line.

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  No six points lie on a conic.

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  If $n=8$ then not all points lie on a singular cubic divisor in such a way that one of the points lies on the singularity.