premise: Delhi Public School Megacity was established in 2004 at Kolkata belonging to the Delhi Public School Society. It is the only DPS other than Delhi Public School Newtown Kolkata to be affiliated to the Council for the Indian School Certificate Educations(CISCE).
hypothesis: Delhi Public School Megacity is the only DPS affiliated with CISCE.
reason: It is the only one other than another school, actually. The model missed the qualifier 'other than'.