Tim Donut Ltd. was founded by Tim Horton, a professional hockey player, in 1964. Ron Joyce, the company’s first franchisee, became an equal partner with Horton in 1966. Tim Horton died in 1974 and his wife inherited his share of the business. In 1975 she sold that share to Joyce for $1 million. Mrs. Horton now claims that after the death of her husband she became addicted to drugs and did not know what she was doing when she sold her share. She says she was unaware for days that she had sold her interest and remembers little from the day of the sale other than sitting in an office and signing some papers. She now seeks to have the contract cancelled.
What doctrines in this chapter are relevant to the situation? What further information is needed to apply those doctrines? What are the major challenges that Mrs. Horton faces in succeeding on her claim?