G.A.S. married his wife, S.I.S., on January 19, 1987. He began to have mental health problems in 2000; that year, he was hospitalized at the Delaware State Hospital for eight weeks. Similar illnesses occurred in 2002 and in the early part of 2004, with G.A.S. suffering from symptoms such as paranoia and loss of a sense of reality. In early 2005, G.A.S. was still committed to the Delaware State Hospital, attending a regular job during the day and returning to the hospital at night. During this time, he entered into a separation agreement prepared by his wife’s attorney. G.A.S., however, never spoke with the attorney about the contents of the agreement; nor did he read it prior to signing. Moreover, G.A.S. was not independently represented by counsel when he executed this agreement. Can G.A.S. disaffirm the separation agreement? Explain.