{"id":"https://openalex.org/W1984450911","doi":"https://doi.org/10.1305/ndjfl/1093893458","title":"Petrus Fonseca and material implication.","display_name":"Petrus Fonseca and material implication.","publication_year":1968,"publication_date":"1968-07-01","ids":{"openalex":"https://openalex.org/W1984450911","doi":"https://doi.org/10.1305/ndjfl/1093893458","mag":"1984450911"},"language":"en","primary_location":{"id":"doi:10.1305/ndjfl/1093893458","is_oa":true,"landing_page_url":"https://doi.org/10.1305/ndjfl/1093893458","pdf_url":"https://projecteuclid.org/journals/notre-dame-journal-of-formal-logic/volume-9/issue-3/Petrus-Fonseca-and-material-implication/10.1305/ndjfl/1093893458.pdf","source":{"id":"https://openalex.org/S78544662","display_name":"Notre Dame Journal of Formal Logic","issn_l":"0029-4527","issn":["0029-4527","1939-0726"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310315698","host_organization_name":"Duke University Press","host_organization_lineage":["https://openalex.org/P4310315698","https://openalex.org/P4310315572"],"host_organization_lineage_names":["Duke University Press","Duke University"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Notre Dame Journal of Formal Logic","raw_type":"journal-article"},"type":"article","indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://projecteuclid.org/journals/notre-dame-journal-of-formal-logic/volume-9/issue-3/Petrus-Fonseca-and-material-implication/10.1305/ndjfl/1093893458.pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5108377147","display_name":"E. J. Ashworth","orcid":null},"institutions":[],"countries":[],"is_corresponding":true,"raw_author_name":"E. J. Ashworth","raw_affiliation_strings":[],"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":1,"corresponding_author_ids":["https://openalex.org/A5108377147"],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":true,"cited_by_count":2,"citation_normalized_percentile":{"value":0.0726106,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":"9","issue":"3","first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T14442","display_name":"Historical Studies in Science","score":0.40380001068115234,"subfield":{"id":"https://openalex.org/subfields/1207","display_name":"History and Philosophy of Science"},"field":{"id":"https://openalex.org/fields/12","display_name":"Arts and Humanities"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},"topics":[{"id":"https://openalex.org/T14442","display_name":"Historical Studies in Science","score":0.40380001068115234,"subfield":{"id":"https://openalex.org/subfields/1207","display_name":"History and Philosophy of Science"},"field":{"id":"https://openalex.org/fields/12","display_name":"Arts and Humanities"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}},{"id":"https://openalex.org/T11137","display_name":"Historical Philosophy and Science","score":0.3580000102519989,"subfield":{"id":"https://openalex.org/subfields/1207","display_name":"History and Philosophy of Science"},"field":{"id":"https://openalex.org/fields/12","display_name":"Arts and Humanities"},"domain":{"id":"https://openalex.org/domains/2","display_name":"Social Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/philosophy","display_name":"Philosophy","score":0.5152295231819153},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.3964076638221741},{"id":"https://openalex.org/keywords/calculus","display_name":"Calculus (dental)","score":0.33292242884635925},{"id":"https://openalex.org/keywords/medicine","display_name":"Medicine","score":0.14647096395492554},{"id":"https://openalex.org/keywords/dentistry","display_name":"Dentistry","score":0.04970642924308777}],"concepts":[{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.5152295231819153},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.3964076638221741},{"id":"https://openalex.org/C2777686260","wikidata":"https://www.wikidata.org/wiki/Q144037","display_name":"Calculus (dental)","level":2,"score":0.33292242884635925},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.14647096395492554},{"id":"https://openalex.org/C199343813","wikidata":"https://www.wikidata.org/wiki/Q12128","display_name":"Dentistry","level":1,"score":0.04970642924308777}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1305/ndjfl/1093893458","is_oa":true,"landing_page_url":"https://doi.org/10.1305/ndjfl/1093893458","pdf_url":"https://projecteuclid.org/journals/notre-dame-journal-of-formal-logic/volume-9/issue-3/Petrus-Fonseca-and-material-implication/10.1305/ndjfl/1093893458.pdf","source":{"id":"https://openalex.org/S78544662","display_name":"Notre Dame Journal of Formal Logic","issn_l":"0029-4527","issn":["0029-4527","1939-0726"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310315698","host_organization_name":"Duke University Press","host_organization_lineage":["https://openalex.org/P4310315698","https://openalex.org/P4310315572"],"host_organization_lineage_names":["Duke University Press","Duke University"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Notre Dame Journal of Formal Logic","raw_type":"journal-article"},{"id":"pmh:oai:CULeuclid:euclid.ndjfl/1093893458","is_oa":false,"landing_page_url":"http://projecteuclid.org/euclid.ndjfl/1093893458","pdf_url":null,"source":{"id":"https://openalex.org/S4306400787","display_name":"Project Euclid (Cornell University)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"Text"}],"best_oa_location":{"id":"doi:10.1305/ndjfl/1093893458","is_oa":true,"landing_page_url":"https://doi.org/10.1305/ndjfl/1093893458","pdf_url":"https://projecteuclid.org/journals/notre-dame-journal-of-formal-logic/volume-9/issue-3/Petrus-Fonseca-and-material-implication/10.1305/ndjfl/1093893458.pdf","source":{"id":"https://openalex.org/S78544662","display_name":"Notre Dame Journal of Formal Logic","issn_l":"0029-4527","issn":["0029-4527","1939-0726"],"is_oa":false,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310315698","host_organization_name":"Duke University Press","host_organization_lineage":["https://openalex.org/P4310315698","https://openalex.org/P4310315572"],"host_organization_lineage_names":["Duke University Press","Duke University"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Notre Dame Journal of Formal Logic","raw_type":"journal-article"},"sustainable_development_goals":[],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":true},"content_urls":{"pdf":"https://content.openalex.org/works/W1984450911.pdf","grobid_xml":"https://content.openalex.org/works/W1984450911.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2748952813","https://openalex.org/W1979597421","https://openalex.org/W2007980826","https://openalex.org/W4245490552","https://openalex.org/W4225152035","https://openalex.org/W2061531152","https://openalex.org/W3002753104","https://openalex.org/W2077600819","https://openalex.org/W1587224694","https://openalex.org/W2911598644"],"abstract_inverted_index":{"Little":[0],"attention":[1],"has":[2,22],"been":[3,23],"paid":[4],"to":[5,61],"the":[6,15,33,64,78,83],"question":[7],"of":[8,27,32,49,77,82],"whether":[9],"material":[10,50],"implication":[11,51],"was":[12,30,75,86],"recognized":[13],"in":[14],"sixteenth":[16,65],"and":[17,58],"seventeenth":[18],"centuries,":[19],"although":[20],"it":[21],"argued":[24],"that":[25,63],"John":[26],"St.":[28],"Thomas":[29],"aware":[31],"equivalence":[34],"'(p":[35],"D":[36],"q)":[37,54],"(~p":[38],"v":[39],"q)'.":[40],"1":[41],"The":[42],"other":[43],"usual":[44],"test-case":[45],"for":[46],"a":[47],"knowledge":[48],"is":[52],"'(po":[53],"=":[55],"~(p":[56],"~qY)":[57],"I":[59],"intend":[60],"show":[62],"century":[66],"Jesuit,":[67],"Petrus":[68],"Fonseca,":[69],"whose":[70],"Institutionurn":[71],"Dialecticarurn":[72],"libri":[73],"octo":[74],"one":[76],"most":[79],"popular":[80],"textbooks":[81],"period,":[84],"2":[85],"well":[87],"acquainted":[88],"with":[89],"this":[90],"second":[91],"equivalence.":[92]},"counts_by_year":[{"year":2020,"cited_by_count":1}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}