{"id":"https://openalex.org/W116505834","doi":null,"title":"Reflections about reflection","display_name":"Reflections about reflection","publication_year":1991,"publication_date":"1991-04-22","ids":{"openalex":"https://openalex.org/W116505834","mag":"116505834"},"language":"en","primary_location":{"id":"pmh:oai:arpi.unipi.it:11568/17334","doi":null,"is_oa":false,"landing_page_url":"http://hdl.handle.net/11568/17334","pdf_url":null,"source":{"id":"https://openalex.org/S4377196265","display_name":"CINECA IRIS Institutial research information system (University of Pisa)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I108290504","host_organization_name":"University of Pisa","host_organization_lineage":["https://openalex.org/I108290504"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/bookPart"},"volume":null,"type":"book-chapter","indexed_in":[],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":null,"display_name":"Giuseppe Attardi","orcid":"https://orcid.org/0000-0003-3875-6404","observed_orcids":["https://orcid.org/0000-0003-3875-6404"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Giuseppe Attardi","raw_affiliation_strings":[],"raw_orcid":"https://orcid.org/0000-0003-3875-6404","affiliations":[]},{"author_position":"last","author":{"id":"https://openalex.org/A5112183198","display_name":"Maria Simi","orcid":null,"observed_orcids":[]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Maria Simi","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]}],"institutions":[],"countries_distinct_count":0,"institutions_distinct_count":0,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":2.6987,"has_fulltext":false,"cited_by_count":13,"citation_normalized_percentile":{"value":0.88985507,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":94},"biblio":{"volume":null,"issue":null,"first_page":"22","last_page":"31"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T11010","display_name":"Logic, Reasoning, and Knowledge","score":0.9653000235557556,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T11010","display_name":"Logic, Reasoning, and Knowledge","score":0.9653000235557556,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11727","display_name":"Advanced Algebra and Logic","score":0.017899999395012856,"subfield":{"id":"https://openalex.org/subfields/1703","display_name":"Computational Theory and Mathematics"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10126","display_name":"Logic, programming, and type systems","score":0.004800000227987766,"subfield":{"id":"https://openalex.org/subfields/1702","display_name":"Artificial Intelligence"},"field":{"id":"https://openalex.org/fields/17","display_name":"Computer Science"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/reflection-principle","display_name":"reflection principle","score":0.7789999842643738},{"id":"https://openalex.org/keywords/modal-logic","display_name":"modal logic","score":0.7279999852180481},{"id":"https://openalex.org/keywords/metalogic","display_name":"metalogic","score":0.6119999885559082},{"id":"https://openalex.org/keywords/consistency","display_name":"consistency","score":0.460999995470047},{"id":"https://openalex.org/keywords/conservative-extension","display_name":"conservative extension","score":0.6639999747276306},{"id":"https://openalex.org/keywords/paradox","display_name":"paradox","score":0.6489999890327454},{"id":"https://openalex.org/keywords/provability","display_name":"provability","score":0.6629999876022339}],"concepts":[{"id":"https://openalex.org/C65682993","wikidata":"https://www.wikidata.org/wiki/Q1056451","display_name":"Reflection (computer programming)","level":2,"score":0.7641065716743469},{"id":"https://openalex.org/C2776436953","wikidata":"https://www.wikidata.org/wiki/Q5163215","display_name":"Consistency (knowledge bases)","level":2,"score":0.7578965425491333},{"id":"https://openalex.org/C2778029271","wikidata":"https://www.wikidata.org/wiki/Q5421931","display_name":"Extension (predicate logic)","level":2,"score":0.6944671869277954},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.6100068092346191},{"id":"https://openalex.org/C2776214188","wikidata":"https://www.wikidata.org/wiki/Q408386","display_name":"Inference","level":2,"score":0.6037800908088684},{"id":"https://openalex.org/C2777686260","wikidata":"https://www.wikidata.org/wiki/Q144037","display_name":"Calculus (dental)","level":2,"score":0.5401138067245483},{"id":"https://openalex.org/C35390924","wikidata":"https://www.wikidata.org/wiki/Q661075","display_name":"Metaprogramming","level":2,"score":0.42862993478775024},{"id":"https://openalex.org/C199360897","wikidata":"https://www.wikidata.org/wiki/Q9143","display_name":"Programming language","level":1,"score":0.4138433337211609},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.3603336215019226},{"id":"https://openalex.org/C199343813","wikidata":"https://www.wikidata.org/wiki/Q12128","display_name":"Dentistry","level":1,"score":0.0},{"id":"https://openalex.org/C71924100","wikidata":"https://www.wikidata.org/wiki/Q11190","display_name":"Medicine","level":0,"score":0.0}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arpi.unipi.it:11568/17334","doi":null,"is_oa":false,"landing_page_url":"http://hdl.handle.net/11568/17334","pdf_url":null,"source":{"id":"https://openalex.org/S4377196265","display_name":"CINECA IRIS Institutial research information system (University of Pisa)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I108290504","host_organization_name":"University of Pisa","host_organization_lineage":["https://openalex.org/I108290504"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"","raw_type":"info:eu-repo/semantics/bookPart"},{"id":"mag:116505834","doi":null,"is_oa":false,"landing_page_url":"https://dblp.uni-trier.de/db/conf/kr/kr91.html#AttardiS91","pdf_url":null,"source":{"id":"https://openalex.org/S4306420732","display_name":"Principles of Knowledge Representation and Reasoning","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"conference"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":"Principles of Knowledge Representation and Reasoning","raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":14,"referenced_works":["https://openalex.org/W40225317","https://openalex.org/W67351769","https://openalex.org/W72919982","https://openalex.org/W146483867","https://openalex.org/W1505605712","https://openalex.org/W1545815294","https://openalex.org/W1604070438","https://openalex.org/W2001599220","https://openalex.org/W2008541670","https://openalex.org/W2084749326","https://openalex.org/W2122870912","https://openalex.org/W2125692076","https://openalex.org/W2239102094","https://openalex.org/W2977904728"],"related_works":["https://openalex.org/W7100256219","https://openalex.org/W7033445112","https://openalex.org/W2618046860","https://openalex.org/W3014179193","https://openalex.org/W7098363152","https://openalex.org/W2726060486","https://openalex.org/W7095585828","https://openalex.org/W1512867733","https://openalex.org/W7096318512","https://openalex.org/W2401653702"],"abstract_inverted_index":{"In":[0],"the":[1,39,42,48,54,64,67,82],"line":[2],"of":[3,7,18,41,56,66],"a":[4,19,76,98],"syntactic":[5],"treatment":[6],"modalities,":[8],"many":[9],"proposals":[10,36],"have":[11],"been":[12],"\\npresented":[13],"consisting":[14],"in":[15,38,75],"an":[16,32],"extension":[17,101],"logic":[20],"calculus":[21],"with":[22,31],"ameta-language\\nfor":[23],"expressing":[24],"facts":[25],"about":[26],"terms":[27],"and":[28,30,51],"sentences,":[29],"axiomatization":[33],"of\\nprovability.":[34],"These":[35],"differ":[37],"use":[40],"inference":[43],"rules":[44,58,73],"used":[45],"\\nto":[46],"link":[47],"object":[49],"level":[50],"meta-level":[52],"theories;":[53],"formulation":[55],"these\\nreflection":[57],"is":[59,110],"crucial":[60],"since":[61],"it":[62],"affects":[63],"consistency":[65,109],"extended\\ncalculus.":[68],"We":[69,96],"argue":[70],"that":[71,89],"reflection":[72],"resulting":[74],"conservative":[77,100],"extension\\nare":[78],"too":[79],"weak.":[80],"On":[81],"other":[83],"hand,":[84],"well":[85],"known":[86],"results":[87],"show":[88],"nonconservative":[90],"extensions":[91],"often":[92],"run":[93],"into":[94],"paradoxes.":[95],"propose":[97],"non":[99],"where":[102],"useful":[103],"theorems":[104],"can":[105],"be":[106],"proved":[107],"while":[108],"retained.":[111]},"counts_by_year":[{"year":2012,"cited_by_count":1}],"updated_date":"2026-10-14T16:39:01.820549","created_date":"2016-06-24T00:00:00"}