Possible Clues:

• Controversial part of PhD is put edifyingly
• Ed - stupid, foolish and challenged?
• Crossed Swords to dish out spud diet
• Subject to disagreement and debate
• Called into question, as set-up did breakdown
• Questioned, challenged veracity
• Theologian admits is put next to Oriental? It¿s not to be believed!
• Quarrelled over
• Argued about
• Called into question