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As indicated above , consideration of a claim of exception from public disclosure with respect to such drafts depends largely upon a comparison of the draft to the information actually released so that a determination can be made as to exactly what is being proposed to be withheld . Both studies involved exposing rats to stressful situations and then assessing how quickly the animals learn to self-administer cocaine by pressing a bar in the testing chamber . Initially , three groups of rats learned that if they pressed a bar in the testing chamber they would be rewarded with food pellets . A comparison of the draft documents to the report which has been released indicates the factual information in the documents in folders A through B-3 appears in the final draft . Take a photo of the computer 's screen . It 's hard to communicate - - if I 'm on a pan line of the long wall , I ca n't communicate - - if I could see it , I could n't communicate with my fellow worker that there was a rib roll or a face roll or a rock on the pan line .