unserialize - [internal], line ??
FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::listSources() - CORE/cake/libs/model/datasources/datasource.php, line 237
DboMysqli::listSources() - CORE/cake/libs/model/datasources/dbo/dbo_mysqli.php, line 146
Model::setSource() - CORE/cake/libs/model/model.php, line 777
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Controller::loadModel() - CORE/cake/libs/controller/controller.php, line 634
Controller::constructClasses() - CORE/cake/libs/controller/controller.php, line 501
Dispatcher::_invoke() - CORE/cake/dispatcher.php, line 186
Dispatcher::dispatch() - CORE/cake/dispatcher.php, line 171
[main] - APP/webroot/index.php, line 113
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 936 of 950 bytes [CORE/cake/libs/cache/file.php, line 190]
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FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 361 of 375 bytes [CORE/cake/libs/cache/file.php, line 190]
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FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 934 of 948 bytes [CORE/cake/libs/cache/file.php, line 190]
unserialize - [internal], line ??
FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 311 of 634 bytes [CORE/cake/libs/cache/file.php, line 190]
unserialize - [internal], line ??
FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 474 of 488 bytes [CORE/cake/libs/cache/file.php, line 190]
unserialize - [internal], line ??
FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 959 of 1930 bytes [CORE/cake/libs/cache/file.php, line 190]
unserialize - [internal], line ??
FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 762 of 1536 bytes [CORE/cake/libs/cache/file.php, line 190]
unserialize - [internal], line ??
FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 950 of 1912 bytes [CORE/cake/libs/cache/file.php, line 190]
unserialize - [internal], line ??
FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 906 of 920 bytes [CORE/cake/libs/cache/file.php, line 190]
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FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Warning (2): unserialize() [function.unserialize]: Extra data starting at offset 795 of 809 bytes [CORE/cake/libs/cache/file.php, line 190]
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FileEngine::read() - CORE/cake/libs/cache/file.php, line 190
Cache::read() - CORE/cake/libs/cache.php, line 362
DataSource::__cacheDescription() - CORE/cake/libs/model/datasources/datasource.php, line 475
DataSource::describe() - CORE/cake/libs/model/datasources/datasource.php, line 278
DboMysqlBase::describe() - CORE/cake/libs/model/datasources/dbo/dbo_mysql.php, line 120
Model::schema() - CORE/cake/libs/model/model.php, line 938
Model::setSource() - CORE/cake/libs/model/model.php, line 789
Model::__construct() - CORE/cake/libs/model/model.php, line 483
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
Model::__constructLinkedModel() - CORE/cake/libs/model/model.php, line 667
Model::__createLinks() - CORE/cake/libs/model/model.php, line 638
Model::__construct() - CORE/cake/libs/model/model.php, line 491
ClassRegistry::init() - CORE/cake/libs/class_registry.php, line 142
studierte Philosophie, Germanistik und Pädagogik an der Ruhr-Universität Bochum. 2006 habilitierte er an der Philosophischen Fakultät der Universität Potsdam (Venia legendi für die Fächer Philosophie und Kulturwissenschaften). 2007 wurde er auf die Professor für Geschichte und Theorie künstlicher Welten an der Bauhaus-Universität Weimar berufen und war Sprecher des Graduiertenkollegs »Mediale Historiographien«. Seine Forschungsschwerpunkte sind Grenzgebiete zwischen politischer Theorie, Literatur und Medien, Kultur- und Wissensgeschichte, Geschichte der Infamie.
Diese Ausgabe des Zürcher Jahrbuchs für Wissensgeschichte zum Thema Nicht-Wissen geht einer produktiven Grenzziehung nach. Der Unterschied von Dogma und Häresie, die Trennung zwischen Expertenwissen und Laienglauben, das Verhältnis von Validierung und Entwertung sowie die wechselseitige Abhängigkeit von Kanonisierungs- und Stigmatisierungsprozessen – sie alle betreffen jene Differenz, mit der Akteure des Wissens eine Grenze zwischen (ihrem) Wissen und dem Nicht-Wissen (der anderen) ziehen. Doch die Grenzziehung ist prekär und ständig von beiden Seiten bedroht. Neues Wissen führt zu Verunsicherungen, weil es bisheriges Wissen zum Nicht-Wissen degradiert. Umgekehrt lässt Nicht-Wissen sich nur so lange gelassen ignorieren, wie es klar von sicheren Wissensbeständen unterschieden werden kann. Die saubere Trennung von Wissen und Nicht-Wissen gehört zur Sisyphusarbeit aller Akteure des Wissens, dient sie doch der Verteidigung von Wissensbeständen gegen die Angriffe jener, die – im wahrsten Sinn des Wortes – per definitionem zu den Ignoranten gezählt werden. Die ständige Definitionsarbeit ist aber auch deshalb von wissenshistorischer Bedeutung, weil sie die Ignoranz der Akteure des Wissens gegenüber den Grenzen ihres Wissens steigert. Je erfolgreicher ihre Definitionsarbeit ist, desto weniger wissen Wissensträger, was sie nicht wissen können. Was aber würde passieren, wenn Wissensgeschichte diesem Umstand Rechnung trüge und eine Geschichte des Nicht-Wissens mitschriebe? Die Vermutung liegt nahe, dass die Wissensgeschichte das von eifrigen Wissensträgern stets akzeptierte Verbot der Selbstbeobachtung bei der Sisyphusarbeit nicht mehr befolgen müsste.