{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,27]],"date-time":"2026-03-27T09:07:36Z","timestamp":1774602456921,"version":"3.50.1"},"reference-count":18,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2005,1,1]],"date-time":"2005-01-01T00:00:00Z","timestamp":1104537600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Cognitive Science"],"published-print":{"date-parts":[[2005,1,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>One of the arguments for active externalism (also known as the extended mind thesis) is that if a process counts as cognitive when it is performed in the head, it should also count as cognitive when it is performed in the world. Consequently, mind extends into the world. I argue for a corollary: We sometimes perform actions in our heads that we usually perform in the world, so that the world leaks into the mind. I call this internalism. Internalism has epistemological implications: If a process gives us an empirical discovery when it is performed in the world, it will also give us an empirical discovery when it is performed in the head. I look at a simple example that highlights this implication. I then explore the relation between internalism and active externalism in more detail and conclude by comparing internalism with mental modeling.<\/jats:p>","DOI":"10.1207\/s15516709cog2901_6","type":"journal-article","created":{"date-parts":[[2005,1,22]],"date-time":"2005-01-22T02:14:19Z","timestamp":1106360059000},"page":"135-143","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Does the World Leak Into the Mind? Active Externalism, \u201cInternalism\u201d and Epistemology"],"prefix":"10.1111","volume":"29","author":[{"given":"Terry","family":"Dartnall","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2005,1]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/0004-3702(91)90053-M"},{"key":"e_1_2_1_3_1","volume-title":"Being there: Putting brain, body and world together again","author":"Clark A.","year":"1997"},{"key":"e_1_2_1_4_1","first-page":"70","article-title":"Review symposium of","volume":"7","author":"Clark A.","year":"1998","journal-title":"Being there. 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