A geometric problem or dilemma where no satisfactory solution exists, named after a figure in medieval geometry.
From Arabic 'dhū al-qarnain' meaning 'possessor of two horns,' referring to a geometric configuration. The term entered Medieval Latin and then English through mathematical treatises.
Medieval mathematicians were so puzzled by this geometry problem that they literally called it 'the two-horned one'—it's like the geometry version of an unsolvable riddle that frustrated scholars for centuries!
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