The Declaration of Reasonable Doubt is an Internet signing petition which seeks to enlist broad public support for the Shakespeare authorship question to be accepted as a legitimate field of academic inquiry. The petition was presented to William Leahy of Brunel University by the actors Derek Jacobi and Mark Rylance on 8 September 2007 in Chichester, England, after the final matinee of the play I Am Shakespeare on the topic of the bard's identity, featuring Rylance in the title role. As of 23 April 2016, the 400th anniversary of Shakespeare's death and the original self-imposed deadline, the document had been signed by 3,348 people, including 573 self-described current and former academics.