Textual criticism:

Bowers and Tanselle argue for rejecting textual variants that an author inserted at the suggestion of others. Bowers said that his edition of Stephen Crane's first novel, Maggie, presented "the author's final and uninfluenced artistic intentions." In his writings, Tanselle refers to "unconstrained authorial intention" or "an author's uninfluenced intentions." This marks a departure from Greg, who had merely suggested that the editor inquire whether a later reading "is one that the author can reasonably be supposed to have substituted for the former", not implying any further inquiry as to why the author had made the change.

Please answer a question about this article. If the question is unanswerable, say "unanswerable". Who wanted to determine why an author made changes to a work?
Tanselle