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However, in situations with incomplete information, one only has partial knowledge about a concept, recently, a common conceptual framework of the notions of interval sets and incomplete formal contexts for representing partially-known concepts were presented. In this study, we examine and reinterpret the existing studies on partially known concepts by means of three-valued logics. By treating an incomplete formal context as a three-valued formal context and considering the one-to-one correspondence between interval sets and three-valued mappings, we investigate the condition under which the four types of partially known concepts can be generated by using three-valued implication operators. Moreover, we also evaluate the role of three-valued logic in characterizing attribute implications. A sufficient and necessary condition for computing the true value of an implication correctly in the sense of Kriple semantics is provided.<\/jats:p>","DOI":"10.3233\/jifs-190111","type":"journal-article","created":{"date-parts":[[2019,8,6]],"date-time":"2019-08-06T12:20:42Z","timestamp":1565094042000},"page":"3053-3064","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":4,"title":["A three-valued logic approach to partially known formal concepts"],"prefix":"10.1177","volume":"37","author":[{"given":"Yanhong","family":"She","sequence":"first","affiliation":[{"name":"College of Science, Xi\u2019an Shiyou University, Xi\u2019an, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wei","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Computer Science, Xi\u2019an Shiyou University, Xi\u2019an, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaoli","family":"He","sequence":"additional","affiliation":[{"name":"College of Science, Xi\u2019an Shiyou University, Xi\u2019an, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yan","family":"Du","sequence":"additional","affiliation":[{"name":"College of Computer Science, Xi\u2019an Shiyou University, Xi\u2019an, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yaoyao","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Computer Science, Xi\u2019an Shiyou University, Xi\u2019an, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2019,8,2]]},"reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.1007\/10722280_27"},{"key":"e_1_3_2_3_2","unstructured":"B\u00ealohl\u00e1vekR. 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