A quick comparison of generated hash identifiers between submissions.
An evaluation of submission content against others, calculating a stepped percentage of similarity.
An evaluation of the file name to determine if there are any oddities to do with copy and pasting.
Did any of the submissions get made by someone else?
Were any of the submissions created at the exact same time?
Evaluate a subjective date indicating the last time a submission was printed against other submissions.
Was the submission last modified at the exact same time as another?
Was there any oddities with the last modifying user of a submission?