A contested header thot is where two or more header thots share the same Authoritative Designation.
The editor automatically detects contested header thots after an editor closes. When contested header thots are found, it exchanges the File of one or more of the offending header thots with a Pile instead, then notifies the user of the change with a notification.
A contested thot is not necessarily a contested header thot, and a contested header thot is not necessarily a contested thot.
A nested contested header thot can also be a contested thot.