Since we are still supporting WikiGrok version A for the time being, we will need to have a 'correct' column that is boolean. Although we will never push claims that have correct set to 'false', we may use such entries to evaluate whether 'true' entries should be pushed or not. For example, if there are 2 entries that say 'occupation:author:true', but 5 that say 'occupation:author:false', we will not want to push 'occupation:author' to Wikidata.