2 THE DES Y1 3X2PT MEASUREMENTS

3 POSTERIOR PREDICTIVE DISTRIBUTION  
3.1 Overview  
3.2 Choice of test statistic for computing \(p\)-value  
3.3 Considerations for application to DES Y1 data  
3.4 Sampling methodology

4 APPLICATION OF POSTERIOR PREDICTIVE CHECKS TO DES Y1 DATA  
4.1 Goodness of fit of the full 3x2pt data vector  
4.2 Goodness of fit of individual two-point functions  
4.3 Testing for internal consistency between the two-point functions  
4.4 Testing for cosmic shear redshift-dependent inconsistency  
4.5 Testing for large and small-scale systematics  
4.6 Testing for cosmic shear systematics  
4.7 The impact of the \((2,4)\) bin of \(\xi_{-}\)

5 INTERNAL CONSISTENCY TESTS FOR DES YEAR 3

6 CONCLUSION