Possible Clues:

• There's a lesson to be learned from being so bad
• Lacking a sense of right or wrong
• Lacking standards
• That's no good by the end of the morning, in a manner of speaking
• Ignoring what's right and wrong in early exam
• I speak against the ethical code
• Unlikely to be judgmental
• For the unprincipled, there's a lesson there
• I'm said to be quite without scruples
• Having no sense of what is right