Why is input manipulation such a nightmare to prove?

Question

Quizplus · Accepted Answer

All of the above options are reasons why input manipulation is difficult to prove. A false audit trail can create confusion as to who actually made the changes, inputting under someone else's credentials can make it appear as though someone else made the changes, and erasing the audit trail removes any evidence of who made the changes. Therefore, input manipulation can be a nightmare to prove in instances where these factors are present.

Why Is Input Manipulation Such a Nightmare to Prove