Question

With God’s help,
forgive me, I only just now read the Rabbi’s column on a litigant’s admission. Is it possible to explain, based on the understanding of “it is in his power,” the law of self-imposed prohibition (“shavya anafshei chatikha de-isura”) in the claim of an “open entrance,” as Rashi understands the passage in Ketubot 9a? (If I am not mistaken, the Ketzot HaChoshen itself addresses this point at the end of its discussion there, though very briefly.)
Thank you very much, and more power to you!