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Whether they then confine with massless composite particles or break their symmetries is unknown.","posed_since":"","precise":"For asymptotically free 4D chiral gauge theories such as SU(5) with fermions in 5bar + 10, or the Bars-Yankielowicz and Georgi-Glashow families, determine the infrared phase: confinement with massless composite fermions saturating 't Hooft anomalies, dynamical Higgsing (tumbling, color-flavor locking), or an IR CFT.","problem_ref":null,"references":"","settled_by":"Nonperturbative simulation of the theory, which requires a lattice chiral regularization, or anomaly arguments that exclude all but one phase.","status_note":"Generalized-anomaly arguments (2019-2025) constrain but do not fix the phase.","title":"Infrared phase of strongly coupled chiral gauge 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