This amicus brief was written in response to Defendants’ appeal of a decision at the Pennsylvania Superior Court that found that whether Rice exercised reasonable diligence in discovering her alleged injury and its cause was a question for the jury. This amicus brief addresses research showing that children often do not recognize that they have been sexually abused until later in life, the ways effects of child sex abuse slow a victim’s ability to appreciate their injuries later in life, and examines other state courts that have applied the discovery rule in cases involving adult survivors of child sex abuse.