Ideas are not protected by copyright, only final expressions of ideas. (law.stackexchange.com)
The key question is whether the document records a deliberate or fixed and final expression of intention as to the disposal of the deceased's property on death. (disinherited.com)
Hence, they discourage the tendency, present in all, to identify ideas that are now possessed and controlled with final expression of all important truths. (religion-online.org)