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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Philosophy</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Philosophy</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Cерия: Философия</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-2302</issn><issn publication-format="electronic">2408-8900</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">43530</article-id><article-id pub-id-type="doi">10.22363/2313-2302-2025-29-1-57-69</article-id><article-id pub-id-type="edn">ETMTOV</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>THE PHILOSOPHY OF PAUL NATORP</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ФИЛОСОФИЯ ПАУЛЯ НАТОРПА</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">On the Systematic Role of the Deduction of Categories in “The Logical Foundations of the Exact Sciences”</article-title><trans-title-group xml:lang="ru"><trans-title>О систематической роли дедукции категорий в «Логических основаниях точных наук»</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0309-7560</contrib-id><name-alternatives><name xml:lang="en"><surname>Pelegrin</surname><given-names>Laura</given-names></name><name xml:lang="ru"><surname>Пелегрин</surname><given-names>Лаура</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD, Postdoctoral Researcher</p></bio><bio xml:lang="ru"><p>доктор философии, постдокторант</p></bio><email>laupel_88@hotmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">University of Buenos Aires</institution></aff><aff><institution xml:lang="ru">Университет Буэнос-Айреса</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-03-31" publication-format="electronic"><day>31</day><month>03</month><year>2025</year></pub-date><volume>29</volume><issue>1</issue><issue-title xml:lang="en">THE PHILOSOPHY OF PAUL NATORP</issue-title><issue-title xml:lang="ru">ФИЛОСОФИЯ ПАУЛЯ НАТОРПА</issue-title><fpage>57</fpage><lpage>69</lpage><history><date date-type="received" iso-8601-date="2025-04-01"><day>01</day><month>04</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Pelegrin L.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Пелегрин Л.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Pelegrin L.</copyright-holder><copyright-holder xml:lang="ru">Пелегрин Л.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/philosophy/article/view/43530">https://journals.rudn.ru/philosophy/article/view/43530</self-uri><abstract xml:lang="en"><p>This work studies the systematic role of the deduction of categories in Paul Natorp’s Logical Foundations of the Exact Sciences. Through an analysis of the deduction of the categories of quantity and quality, we contend that this deduction is not merely a historiographical exercise, but it is the core of Natorp’s system. It is argued that Natorp follows a synthetic method, rather than an analytic, similar to that employed by Kant in the Critique of Pure Reason . We argue that the core of Natorp’s deduction is rooted in the principle of correlation. Unlike Kant, who derives categories from the table of judgments, Natorp constructs his deduction by examining the structure of thought itself. We demonstrate that this approach allows for a systematic deduction of the properties of number and the fundamental series. The study shows how this deduction of categories is the ground for the construction of the fundamental series and how it is aligned with Natorp’s methodological prescriptions.</p></abstract><trans-abstract xml:lang="ru"><p>В данной работе исследуется систематическая роль дедукции категорий в «Логических основаниях точных наук» Пауля Наторпа. Анализируя дедукцию категорий количества и качества, мы утверждаем, что эта дедукция является не просто историографическим упражнением, а ядром системы Наторпа. Утверждается, что Наторп следует синтетическому, а не аналитическому методу, подобному тому, который использовал Кант в «Критике чистого разума». Мы утверждаем, что в основе дедукции Наторпа лежит принцип корреляции. В отличие от Канта, который выводил категории из таблицы суждений, Наторп строит свою дедукцию, исследуя саму структуру мышления. Мы показываем, что этот подход позволяет систематически выводить свойства числа и фундаментального ряда. В исследовании показано, как эта дедукция категорий является основанием для построения фундаментального ряда и как она согласуется с методологическими предписаниями Наторпа.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Natorp</kwd><kwd>fundamental series</kwd><kwd>synthetic method</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Наторп</kwd><kwd>фундаментальный ряд</kwd><kwd>синтетический метод</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Katsur I. From Monism to Pluralism: Cassirer’s Interpretation of Kant. RUDN Journal of Philosophy. 2023;27(3):556-567. https://doi.org/10.22363/2313-2302-2023-27-3-556-567</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Caimi M. Gedanken ohne Inhalt sind leer. Kant-Studien. 2005;96(2):135-146. https://doi.org/10.1515/kant.2005.96.2.135</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Caimi M. Kant’s B Deduction. 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