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In the statement above, $\mathcal{I} \ $ is the set of idempotent binary relations on a finite set, $\text{row}(X)$ denotes the row space of the relation $X$, $\text{col}(X)$ denotes the column space of $X$, and $XY$ denotes composition of the relations $X$ and $Y$.

I wrote a code in Mathematica that indicates the statement is true for binary relations on sets of size less than 5.

I would like to see a counter example or a proof.

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