Would you not create a new record for each person who reviews the paper and the use the Group function to compare the two reviews for the same paper?
Paper 1 reviewed by Person A…
Paper 1 reviewed by Person B…
Paper 2 reviewed by Person A…
Paper 2 reviewed by Person B…
Or are you trying to have one record for each paper with both reviewers notes on it?
Paper 1, Person A Notes, Person B Notes
You could create a form for each reviewer that was setup for the fields that their data will be entered into.