{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,3,29]],"date-time":"2022-03-29T12:09:36Z","timestamp":1648555776615},"reference-count":6,"publisher":"Cambridge University Press (CUP)","issue":"4","license":[{"start":{"date-parts":[[2014,3,12]],"date-time":"2014-03-12T00:00:00Z","timestamp":1394582400000},"content-version":"unspecified","delay-in-days":16506,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. symb. log."],"published-print":{"date-parts":[[1969,1]]},"abstract":"<jats:p>In the original formulations of Lewis's S1\u2013S5 in [1], Feys's S1\u00b0, S2\u00b0 in [2], and Soboci\u0144ski's S3\u00b0, S4\u00b0 in [3], a primitive rule is that of replacement for strict equivalents <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" mime-subtype=\"gif\" xlink:type=\"simple\" xlink:href=\"S0022481200109181_inline1\" \/> which it is enough to express formally as:<\/jats:p><jats:p>RI: <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" mime-subtype=\"gif\" xlink:type=\"simple\" xlink:href=\"S0022481200109181_inline2\" \/> where <jats:italic>\u03b3\u2032<\/jats:italic> is like <jats:italic>\u03b3<\/jats:italic> except for having <jats:italic>\u03b2<\/jats:italic> at one place where <jats:italic>\u03b3<\/jats:italic> has \u03b1.<\/jats:p>","DOI":"10.2307\/2271365","type":"journal-article","created":{"date-parts":[[2006,5,6]],"date-time":"2006-05-06T20:50:27Z","timestamp":1146948627000},"page":"569-570","source":"Crossref","is-referenced-by-count":0,"title":["Replacement in some modal systems"],"prefix":"10.1017","volume":"33","author":[{"given":"Ivo","family":"Thomas","sequence":"first","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2014,3,12]]},"reference":[{"key":"S0022481200109181_ref003","doi-asserted-by":"publisher","DOI":"10.1305\/ndjfl\/1093957059"},{"key":"S0022481200109181_ref005","doi-asserted-by":"publisher","DOI":"10.1305\/ndjfl\/1093958339"},{"key":"S0022481200109181_ref001","volume-title":"Symbolic logic","author":"Lewis","year":"1959"},{"key":"S0022481200109181_ref002","doi-asserted-by":"publisher","DOI":"10.3406\/phlou.1937.3056"},{"key":"S0022481200109181_ref004","first-page":"176","article-title":"New foundations for Lewis modal systems","volume":"21","author":"Lemmon","year":"1957","journal-title":"this Journal"},{"key":"S0022481200109181_ref006","unstructured":"Zeman J. J. , Lemmon-style bases for the systems S1\u00b0-S4\u00b0, this Journal (to appear)."}],"container-title":["Journal of Symbolic Logic"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0022481200109181","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,6,1]],"date-time":"2019-06-01T20:40:36Z","timestamp":1559421636000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0022481200109181\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1969,1]]},"references-count":6,"journal-issue":{"issue":"4","published-print":{"date-parts":[[1969,1]]}},"alternative-id":["S0022481200109181"],"URL":"https:\/\/doi.org\/10.2307\/2271365","relation":{},"ISSN":["0022-4812","1943-5886"],"issn-type":[{"value":"0022-4812","type":"print"},{"value":"1943-5886","type":"electronic"}],"subject":[],"published":{"date-parts":[[1969,1]]}}}