To construct realistic examples suitable for inductive reasoning, we chose the disorders ERCC6-related Cockayne syndrome and ERCC8-related Cockayne syndrome, which are both inherited in an autosomal-recessive pattern and caused by pathogenic variants in either ERCC6 (MIM: 133540, located at chromosome 10q11.23) or ERRC8 (MIM: 216400, located at chromosome 5q12.1). Here, ERCC6 is linked to Cockayne syndrome.