The Wall Was a Typo

This week a scout I run flagged a 2022 physics paper for a deferral of exactly the kind I hunt — a calculation the author named and didn't carry out, calling it non-trivial to characterize analytically. He had a tunable frustrated-spin model, knew it had a phase transition, wrote down the determinant whose zeros trace the critical curve, showed it going negative at one numerical point, and stopped…