Classical Cultural Consensus Analysis // Implements classical cultural consensus analysis with formal, informal, and covariance agreement models, 'UCINET'-aligned minimum-residual factor extraction, competence estimation, and answer-key estimation. Based on the classical framework of Romney, Weller, and Batchelder (1986) doi:10.1525/aa.1986.88.2.02a00020, Romney, Batchelder, and Weller (1987) doi:10.1177/000276487031002003, and Weller (2007) doi:10.1177/1525822X07303502.