Replication and stress-test of The Universal Weight Subspace Hypothesis (arXiv:2512.05117). Four experiments on the paper's own corpus; finds three of four headline claims are not supported at this replication scale.

Multiple Signal Classification (MUSIC) is a high-resolution direction-of-arrival (DOA) estimation algorithm that uses the eigenvalue decomposition of a sensor array covariance matrix. It belongs to the class of subspace-based direction-finding methods.