Possible Clues:

• They deviate from what is standard, normal, or expected
• Inconsistencies in Leonardo's work: first half is back to front; second half reportedly so
• They're unusual or different from what is expected
• They're not what's expected
• Moan about a story's inconsistencies
• Blips
• Departures, of sorts
• A moan about stories making exceptions
• A traveller mostly tells stories to find inconsistencies
• Inconsistencies as some nail a criminal