Take the case of Elyse Schein and Paula Bernstein. Elyse and Paula were identical twins separated at birth. Both girls knew that their parents Cloze (1): had allowedhave beenhad hadhad never saidhad arrangedhad adoptedhad toldhad beenhad stoppedhad both studiedhadn´t think JXUwMDMwJXUwMDA5JXUwMDA1JXUwMDQ0JXUwMDQxJXUwMDA1JXUwMDBiJXUwMDFmJXUwMDA0JXUwMDExJXUwMDAx them as infants, but neither girl knew about her twin. When Elyse grew up, she longed to meet her biological mother, so she contacted the agency that Cloze (2): had allowedhave beenhad hadhad never saidhad arrangedhad adoptedhad toldhad beenhad stoppedhad both studiedhadn´t think JXUwMDMwJXUwMDA5JXUwMDA1JXUwMDQ0JXUwMDQxJXUwMDEzJXUwMDAwJXUwMDEzJXUwMDBmJXUwMDA5JXUwMDAyJXUwMDAx the adoption. She had been doing research on her birth mother when she made a surprising discovery. She had an identical twin. Even more surprising, she learned that she Cloze (3): had allowedhave beenhad hadhad never saidhad arrangedhad adoptedhad toldhad beenhad stoppedhad both studiedhadn´t think JXUwMDMwJXUwMDA5JXUwMDA1JXUwMDQ0JXUwMDQyJXUwMDA3JXUwMDAwJXUwMDBi part of a secret scientific study.

At the time of the adoption, the agency Cloze (4): had allowedhave beenhad hadhad never saidhad arrangedhad adoptedhad toldhad beenhad stoppedhad both studiedhadn´t think JXUwMDMwJXUwMDA5JXUwMDA1JXUwMDQ0JXUwMDQxJXUwMDBkJXUwMDAwJXUwMDAzJXUwMDE4JXUwMDEyJXUwMDAx different families to adopt each twin. The agency Cloze (5): had allowedhave beenhad hadhad never saidhad arrangedhad adoptedhad toldhad beenhad stoppedhad both studiedhadn´t think JXUwMDMwJXUwMDA5JXUwMDA1JXUwMDQ0JXUwMDU0JXUwMDFiJXUwMDAzJXUwMDA4 the families that their child was part of a scientific study. However, it Cloze (6): had allowedhave beenhad hadhad never saidhad arrangedhad adoptedhad toldhad beenhad stoppedhad both studiedhadn´t think JXUwMDMwJXUwMDA5JXUwMDA1JXUwMDQ0JXUwMDRlJXUwMDBiJXUwMDEzJXUwMDEzJXUwMDE3JXUwMDUyJXUwMDUzJXUwMDEyJXUwMDA4JXUwMDBk  the goal of the study: for scientists to investigate nature versus nurture.

When Elyse and Paula finally met as adults, they were amazed. They had many similarities. They looked almost identical. They Cloze (7): had allowedhave beenhad hadhad never saidhad arrangedhad adoptedhad toldhad beenhad stoppedhad both studiedhadn´t think JXUwMDMwJXUwMDA5JXUwMDA1JXUwMDQ0JXUwMDQyJXUwMDBkJXUwMDFiJXUwMDFjJXUwMDQ4JXUwMDUzJXUwMDA3JXUwMDAxJXUwMDExJXUwMDBkJXUwMDBjJXUwMDAx film. They both loved to write. Together, the twins discovered that the researchers Cloze (8): had allowedhave beenhad hadhad never saidhad arrangedhad adoptedhad toldhad beenhad stoppedhad both studiedhadn´t think JXUwMDMwJXUwMDA5JXUwMDA1JXUwMDQ0JXUwMDUzJXUwMDA3JXUwMDFiJXUwMDFmJXUwMDAwJXUwMDE1JXUwMDAx the study before the end because the public strongly disapproved of this type of research.