Before revision:  Rooted in a long tradition in knowledge representation, all popular KBs only store positive information, while they abstain from taking any stance towards statements not contained in them. In this paper , we make the case for explicitly stating interesting statements which are not true .
After revision:  Rooted in a long tradition in knowledge representation, all popular KBs only store positive information, while they abstain from taking any stance on statements not stored in the KB. This paper makes the case for explicitly stating interesting statements which are not true .