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Boolean Conjunctive Normal Form (CNF) expansion can effectively address the vocabulary mismatch problem, a problem that current retrieval techniques have very limited ability to solve. Meanwhile, expert searchers are found to spend large amounts of time carefully creating manual CNF queries. These CNF queries are highly effective, and can outperform bag of word queries by a large margin. However, not many effective tools exist that can facilitate the efficient manual creation of effective CNFdoi:10.1184/r1/6473855.v1 fatcat:zzcr74agnfawxez7a3xons4m7e