“Deference and the Dynamic Lexicon.” Talk at Meanings: Enduring, Revising, Engineering. NOVA Univeristy, July 11, 2019.

“The Dynamic Lexicon and Deference.” Lectures given at Center for the Study of Logic and Epistemology, UNICAMP, Brazil, June 10-14, 2019.

What Comes First, Theory or Data.” INCog group, Pontificia Universidade Católica do Rio de Janeiro, Sep. 26, 2018.

“The Dynamic Lexicon.” Universidade Federale Fluminense, Rio de Janiero. Sept. 24, 2018.

“Truth in Fanfiction.” Universidae Federale do Amazonas, Manaus. Sept. 19, 2018.

“Descriptions and Externalism.” Federal University of Brazil, Salvador. Sept. 17, 2018.

“The Social Furniture of Virtual Worlds.” Brazilian Society for Analytic Philosophy, Salvador, Brazil. Sept. 13, 2018.

“Interperspectival Content.” Minicourse given at UNICAMP, Campinas, Brazil. Sept. 4- 6, 2018.

“Prosecutors Gone Wild (and Hacktivists in Trouble)”. John Jay College. Oct. 31, 2013.

“The Dynamic Lexicon, Logic, and Vagueness.” McMaster University. Oct. 25, 2013.

“Living Words.” McMaster University. Oct. 23, 2013.

“Hacktivism, Whistleblowers, and the Banality of Systemic Evil.” McMaster University. Oct. 21, 2013.

“Hacktivism and Systemic Evil.” Talk at Thoughtworks Away Day, Brazil. Oct. 18, 2013.

“Hacktivism and Systemic Evil.” Dept. of Philosophy, Rio de Janeiro, Brazil. Oct. 15, 2013.

“The War on Hacktivists.” Thoughtworks Home Office Day. Chicago, Sept. 13, 2013.

“What Can we Learn from the Unabomber?: Nothing.” Panel on the Unabomber Manifesto, SXSW, Austin, TX, March 8, 2013

“What Can we Learn from the Unabomber: Nothing.” Symposium on the Unabomber Manifesto, Rutgers University, Oct. 4, 2012.

“The Dynamic Lexicon.” Talk given at Rutgers University semantics workshop, Sept. 28, 2012.

“Knowledge Optimization in Adversarial Environments.” Northwestern Conference on Group Epistemology, June 24, 2012.

“Knowledge Optimization and Degradation in the Age of Wikileaks.” Conference on Epistemological Problems of Privacy and Secrecy. Delft, The Netherlands, June 9, 2012.

“Group Epistemology, Hacktivism, and Irregular Warfare.” Dept. of Philosophy, Groningen University, Groningen, The Netherlands, June 5, 2012.

“Reply to Critics.” Reply in Author Meets Critics session on my book The Philosophy of Generative Linguistics. Pacific APA Meeting, Seattle WA, April 5, 2012.

“Moral Disagreement as Metalinguistic Disagreement.” Talk given at conference on Moral Disagreement, University of Chicago, March 20, 2012

“Tensism.” Talk given at Festival of Science, Rome Italy, Jan. 20, 2012.

“Linguistic Judgments and Individual Norms.” Dept. of Philosophy, University of Illinois at Chicago. Nov. 14, 2011.

“Linguistic Judgments and Individual Norms.” Dept. of Philosophy, University of California, Santa Barbara. Nov. 4, 2011.

“Is Progress in Philosophy Possible?.” Harvard/ANU conference on philosophical progress. Harvard University. Oct .17, 2011.

“Meaning Underdetermination, Logic, and Vagueness.” International Conference on Language and Value, Beijing Normal University, Aug. 27, 2011.

“The Dynamic Lexicon.” Minicourse (four lectures) at Beihang University, Beijing China, Aug. 22-25, 2011.

“Theoretical Perspectives on Reference.” Rutgers AEF Interdisciplinary Meeting on Approaches to Reference. Rutgers University, Aug. 13, 2011.

“Wikileaks Symposium.” Panel discussant. International Journalism Festival, Perugia Italy, April 16, 2011.

“Netizens of the World Unite.” Panel discussant. International Journalism Festival, Perugia, Italy, April 13, 2011.

“Linguistic Judgments." Working group in history and philosophy of logic, University of California, Berkeley. March 9, 2011.

“Meaning Underdetermination, Vagueness, and Truth.” Kansas State University, Dept. of Philosophy. Feb. 15, 2011.

“Linguistic Intuitions/Judgments.” Kansas State University, Dept. of Philosophy. Feb. 14, 2011.

“Cheap Contextualism and Meaning Underdetermination.” Philosophy and Linguistics Groups (Phling), Northwestern University. Oct. 22, 2010.

“Cheap Contextualism and Meaning Underdetermination.” Workshop in Semantics and Philosophy of Language, University of Chicago. Oct. 29, 2010.

“Attitudes De Se, De Nunc, and De Hic.” Arché/CSMN Mini-course & Workshop: De Se Attitudes, University of Oslo. June 9, 2010.

“Cheap Contextualism and Meaning Underdetermination.” Conference on Contextualism and Compositionality, University of Paris. May 17, 2010.

“LF and Natural Logic: The Syntax of Directional Entailing Environments.” Institute for Logic, Language, and Computation, University of Amsterdam. April 16, 2010.

“At the Interface: Referential Semantics for Ψ-Languages?” Keynote, Distinguished Scholar Workshop. Cambridge University. April 12, 2010.

“Tensism.” Keynote lecture, STALDAC: Space and Time across Languages, Disciplines and Cultures, Cambridge University. April 10, 2010."Deeply Embedded Journalism in Virtual Worlds." Society for Cinema and Media Studies. Los Angeles. March 22, 2010.

"Narrative Guided Programming FTW!" Conference on Aesthetic Computing. University of North Carolina at Charlotte, March 18, 2010.

"Narrative Guided Programming in Virtual Worlds." Dept. of Information Sciences. Duke University. March 17, 2010.

"Deeply Embedded Journalism in Virtual Worlds." Virtual Worlds Symposium. Northwestern University. Feb. 11, 2010.

“Narrative Guided Programming in Virtual Worlds." Festival of Science. Rome, Italy, January 16, 2010.

"Tutorial on Tense and Time." Arche, University of St. Andrews, Scotland. Oct. 19-20, 2009.

"Linguistic Judgments.” Oslo, Norway, Nov. 15, 2009.

“Cheap Contextualism, Truth, and Meaning Underdetermination.” Dept. of Philosophy, UNLV. September, 2009.

“Cheap Contextualism, Truth, and Meaning Underdetermination” Riga, Latvia, Aug. 6, 2009.

Minicourse on Indexicals. University of Rio di Janeiro, Brazil. June 8-10, 2009.

“Cheap Contextualism, Truth, and Underdetermination.” University of Buenos Aires, Argentina. June 4, 2009.

“Semantics, Expressivism, and the Legibility of Recursive Structures.” Conference on Recursion. University of Massachusettes. May 26, 2009.

“Cheap Contextualism, Truth, and Underdetermination.” Conference on Contextualism and Truth, Arche, University of St. Andrews, Scotland. May 23, 2009.

“Truth is Cheap.” APA Pacific Division Meeting, Vancouver, Canada, April 9, 2009.

“Intellectual Property in Second Life”. UNLV, conference on intentional communities online, Feb 17, 2009.

“Intensional Transitive Verbs (Including Verbs of Depiction)”. APA Eastern Division Meeting. Philadelphia, Dec. 27, 2008.

“Linguistic Judgments” Talk to PhilLing group at Northwestern, Oct. 10, 2008.

“Linguistic Judgments.” Department of Philosophy, University of North Carolina, Aug. 22, 2008.

“Microlanguages” World Congress of Philosophy, Seoul, Korea, Aug. 1, 2008.

“Nonsentential Speech”, University of Western Ontario. May 25, 2008.

“Cheap Contextualism.” Central APA, Chicago, April 17, 2008,

“The Nature of Language.” Kline Conference, University of Missouri, April 12, 2008.

“Linguistic Judgments.” University of Buffalo, March 26, 2008.

“Linguistic Judgments.” Pacific APA, Passadena, March 20, 2008.

“Transgressive Behavior Online.” SXSW, Austin Texas, March 8, 2008.

“Truth in Fanfic.” Symposium at the American Association for Aesthetics, Los Angeles, Nov., 9, 2007.

“Language and Reality,” Mental Phenomena: the Philosophy of Linguistics. Inter-University Center, Dubrovnik, Croatia, Sept., 2007.

“Emergent Gameplay, Deviant Ageplay, and the Elusive Payday of Business in Second Life.” University of Twente, The Netherlands, June 13, 2007.

“Implicit Comparison Classes Redux.” Workshop on Adjectives. St. Andrews University, May 19, 2007.

“By Jason’s Standards this is ‘Cheap Contextualism’.” International conference on Linguistics and Epistemology, University of Aberdeen, Scotland, May 12-13 2007.

“Natural Logic, Directional Entailingness, and Ontology.” Dept. of Philosophy, University of Toronto, Jan. 9, 2007.

“The Holy Grail of Natural Logic: from the Dicta de Omni et Nullo to the Syntax of Directional Entailingness.” Dept. of Philosophy and Dept. of Linguistics, Yale University, Nov. 9, 2006.

“Indexical Sense,” University of Lisbon, Lisbon, Portugal. Oct 6, 2006.

“Linguistic Data,” Mental Phenomena: the Philosophy of Linguistics. Inter-University Center, Dubrovnik, Croatia. Sept. 14, 2006.

“Sub-sentential Utterances and Minimalism.” Workshop on Ellipsis and Philosophy of Language, University of Western Ontario. May 5, 2006.

“The Myth of Human Language and the Economies of Communication,” Context and Communication Conference, University of Oslo, Oslo, Norway, April 26, 2006.

“Virtual Entrepreneurs.” Talk at South by Southwest Conference, Austin, Texas, March 14, 2006.

“Virtual Press in MMORPGs.” Talk given at Screenburn session of South by Southwest Conference, Austin, Texas, March 11, 2006.

“The Myth of Human Language.” Keynote Address, Undergraduate Philosophy Conference, University of Central Oklahoma, Feb. 16, 2006.

“The Myth of Human Language.” University of Toronto, Dept. of Philosophy, Oct. 21, 2005.

“The Myth of Human Language and the Economy of Linguistic Expression.” Mental Matters: the Philosophy of Linguistics. Dubrovnik, Croatia, Sept. 6, 2005.

“Dynamic Lexical Semantics.” Meaning and Communication Conference. Lisbon, Portugal, June 5, 2005.

“Presentism and the Problem of Temporal Reference,” Cornell University, Dept. of Philosophy, April 12, 2005.

“Virtually Journalism” talk and panel discussant, symposium on online journalism, South by Southwest Conference (SXSW), Austin, TX. March 14, 2005.

“Avatar Rights, Virtual Liberty, and Free Expression in Virtual Worlds” talk and panel discussant, The State of Play conference, New York Law School, October 29, 2004.

“The State of Play” talk and panel discussant, opening session of The State of Play conference, New York Law School, October 28, 2004.

"The Dynamic Lexicon and Conceptual Analysis Naturalized." Conference on Cognitive Systems as Representational Systems, Nicolaus Copernicus Universiy, Torun, Poland. Sept. 29, 2004.

"Presentism and the Problem of Temporal Anaphora." Workshop on the philosophy of time, University of Geneva, Geneva, Switzerland, July 4, 2004.

"The Syntax of Directional Entailingness and the Myth of the Determiner." Semantics Workshop, University of Connecticut, May 21, 2004.

"The Logical Form of Determiners." Dept. of History and Philosophy of Science, University of California at Irvine. May 14, 2004.

"Sex and the Virtual City: On the Two Way Flow Between Fictional and Real Objects." Conference on Philosophy and Popular Culture, SUNY Albany, April 3, 2004.

"Sex and the Virtual City: On the Two Way Flow Between Fictional and Real Objects." General Lecture, Webster University, St. Louis, Feb. 20, 2004.

"Natural Logic and the Holy Grail." Language, Mind, and World. Buenos Aires, Argentina, May 28, 2003.

"A Plea for Presentism." Keynote address, University of Texas, Austin, Graduate Student Philosophy Conference, April 5, 2003.

“On a Unified Semantical Analysis of Definite and Indefinite Descriptions.” Department of Linguistics, SUNY Stony Brook, Sept. 13, 2002.

“On a Unified Semantical Analysis of Definite and Indefinite Descriptions.” Special Session on Semantics and Pragmatics, Kentucky Foreign Language Association University of Kentucky, April 19, 2002.

"Natural Logic and the Holy Grail." University of Michigan, Depts. of Philosophy and Linguistics. Jan. 25, 2002.

"The Myth of Non-sentential Speech." Conference on Context-relativity in Semantics, Department of Philosophy, University of Cincinnati, Nov., 2001.

"Natural Logic and the Holy Grail." Syracuse University, Dept. of Philosophy, Oct. 3, 2001.

"Metaphysical Austerity and the Problems of Temporal and Modal Anaphora." Rutgers University Center for Cognitive Science, workshop in semantics, May 18, 2001.

"Externalism, Self-Knowledge, Memory, Logic, etc." Sage School of Philosophy, Cornell University, Feb. 23, 2001.

"Presentism and the Problem of Temporal Anaphora." Dept. of Philosophy, Princeton University, Nov. 17, 2000.

"A Plea for Presentism." 5^th Annual Meeting of the Vienna-Istanbul Philosophy Circle, University of Istanbul, Turkey, Oct. 19, 2000.

"Intensional Transitive Verbs and Abstract Clausal Complementation." (With Richard Larson). Rutgers University Center for Cognitive Science, workshop in semantics. May 12, 2000.

"Presentism and the Problem of Temporal Anaphora." Dept. of Philosophy, University of Western Michigan, March 17, 2000.

"For Presentism." Dept. of Philosophy, Cornell University, Nov. 6, 1999.

"LF and Natural Logic: on the Syntax of Directional Entailingness." Dept. of Linguistics. MIT, April 16, 1999.

"Externalism, Self-Knowledge, and Memory." Dept. of Philosophy, University of California, Davis, May 22, 1998.

"A Plea for Prior." UCLA Workshop on Tense, Lake Arrowhead, California, May 18, 1998.

"A Plea for Prior." Dept. of Philosophy, Univerity of Milan, Milan, Italy, April 22, 1998.

"Prior vs. Reichenbach: Two Theories of Tense." Dept. of English and German Philology, Autonoma University, Barcelona, Spain, April 1, 1998.

"There Is No Such Thing as Language." Dept. of English and German Philology, Autonoma University, Barcelona, Spain, March, 31, 1998.

"There Is No Such Thing as Language." Dept. of English, Complutense University, Madrid, Spain, March 30, 1998.

"The Semantics/Pragmatics Interface." Series of lectures given at the University of Jaen, Jaen, Spain, March 23-26, 1998.

"A Reduction of Tense to Modality and Evidentiality." Department of Linguistics, Scuola Normale Superiore, Pisa, Italy, March 6, 1998.

"Externalism, Self-Knowledge, Slow Switching and Memory." Department of Philosophy, Kings College, London, Jan. 14, 1998.

"There Is No Such Thing as Language" Department of Philosophy, Kings College, London, Jan. 12, 1998.

"Invisible Complement Clauses." Workshop on Theoretical Syntax, University of Venice, Italy, July 12, 1997.

"The Nature of Language." Series of lectures given at the Faculty of Philosophy, Novi Sad State University. Novi Sad, Yugoslavia. May 7-9, 1997.

"A Defence of the A-theory of Time," Moral Sciences Club, Cambridge University, Feb. 4, 1997.

"Temp e Tempo Verbale," Conference on the Question of Temporality, Department of Philosophy and the Theory of the Sciences, University of Venice, Italy, Oct. 25, 1996.

"Referential Semantics for I-language," Conference on Naturalizing Semantics, Maribor, Slovenia, June 10-15, 1996.

"Tensed Truths Without Future or Past Events," Inter-University Center Conference on Truth, Bled, Slovenia, June 3-8, 1996.

"Hunting Unicorns with Interpreted Logical Forms," Dept. of Philosophy, Rutgers University, March 28, 1996.

"Invisible Complement Clauses to Intensional Verbs," Dept. of Linguistics, University of Delaware, March 1, 1996.

"Invisible Complement Clauses to Intensional Verbs," Dept. of Cognitive Science, University of Potsdam, Potsdam Germany, Dec. 14, 1995.

"Semantics of Tense without Future and Past Events," Department of Linguistics, Humbolt University, Berlin, Germany, Dec. 13, 1995.

"Referential Semantics for I-Languages," Dept. of Cognitive Science, Johns Hopkins University, Nov. 2, 1995.

"Invisible Complement Clauses to Intensional Verbs," Dept. of Linguistics, Free University of Amsterdam, Amsterdam, The Netherlands, Oct. 20, 1995.

"On Chomsky on the Possibility of Semantics," Riejka Branch of the Section for Analytical Philosophy, Croatian Philosophical Society, Riejka, Croatia, July 11, 1995.

"Social Externalism and Self-Knowledge," International Symposium on Language, Mind, and Society. Maribor University, Maribor, Slovenia, June 3, 1995.

"Time and Tense," Dept. of Philosophy, University of Maryland, College Park, MD, April 12, 1995.

A series of four lectures in the Department of Philosophy and Law, Novosibirsk State University, Novosibirsk, Russia, April 3-6, 1995.

- "Issues in Analytic Philosophy of Mind," April 6.

- "Analytic Philosophy in the U.S. and Europe," April 5.

- "The Roots of Analytic Philosophy," April 4.

- "Contintental & Analytic Philosophy in the U.S. and Europe today," April 3.

"From Robots to Knowbots: Artificial Intelligence in the Library of the Future." Keynote address, Conference on Libraries and the Future, Dowling College, NY, Oct. 28, 1994.

"The Logical Form of Determiners." Department of Philosophy, University of Bologna, Italy. Nov. 18, 1993.

Three lectures in the Department of the History of Philosophy, The University of Padua, Italy. (Oct. -Nov. 1993.)

- "The Semantics of Tense and the Metaphysics of Time," Nov. 15.

- "Moving from Semantics to Metaphysics: The Promise of the Bottom-Up Methodology," Nov. 8.

- "The Metaphysics of the Dynamic Temporal and the Static Temporal," Oct. 25.

"Indexical Knowledge and the Possibility of an Omniscient Being." St. Petersburg State University. Saint Petersburg, Russia. April 22, 1993.

"The Logical Form of Determiners." APA Eastern Division Meeting, Washington, D.C., Dec. 1992.

"Interpreted Logical Forms." University of Southern California, Department of Philosophy. Oct. 24, 1991.

"Conditionals, Events, and Unbound Pronouns." University of Southern California, Dept. of Linguistics. Oct. 23, 1991.

"In Defense of the Dual Aspect Theory." 17th Annual Meeting of the Society for Philosophy and Psychology, San Francisco State University, June 10, 1991.

"In Defense of the Dual Aspect Theory." SUNY Binghamton, Dept. of Philosophy and the Program in Philosophy and Computer and System Sciences. Oct. 26, 1990.

"Interpreted Logical Forms." (With Richard Larson.) University of Massachusettes at Amherst, Linguistics Colloquium. Oct. 12, 1990.

"A Syntactic Theory of Non-elementary Quantifiers." Group in Logic and the Methodology of Science, University of California at Berkeley, Oct. 5, 1990.

"Intensionality and Truth-theoretic Semantics." Guest lecture in graduate seminar on the philosophy of language. University of California at Berkeley, Oct. 3, 1990.

"Kripke’s Critique of Rule Following and its Consequences for the Cognitive Sciences." 16th Annual Meeting of the Society for Philosophy and Psychology, University of Maryland. Symposium on Rule-following. June 8, 1990.

"A Syntactic Theory of Non-elementary Quantifiers." Association for Symbolic Logic Summer Meeting, Berlin, West Germany, July 25-Aug. 4, 1989.

"Interpreted Logical Forms." (With Richard Larson.) 2nd Annual Irvine Linguistics Workshop: Logical Form and Truth-Theoretic Semantics. University of California at Irvine, April 14, 1990.

"Logical Form." Guest lecture in graduate seminar in the philosophy of language. Princeton University, April 6, 1989.

"A Russellian Foundation for Discourse Representation Theory." Uni­versity of California at Irvine, Dept. of Linguistics, March 16, 1988.

"Cognitive Psychology and the Problem of Wide Content." SUNY at Stony Brook, Dept. of Philosophy, Feb. 2, 1988.

"Cognitive Psychology and the Problem of Wide Content." Columbia University, Dept. of Philosophy, Jan. 26, 1988.

"The Notion of Logical Form in Government-Binding Theory." SUNY at Stony Brook, Dept of Linguistics, Oct. 23, 1987.

"Russellian Indefinites, Russellian 'Anaphors'." (With Stephen Neale.) Association for Symbolic Logic Summer meeting, Granada, Spain, July 23, 1987.

"Indefinites." (With Stephen Neale.) CSLI Seminar, Center for the Study of Language and Information, Stanford University, part 1 on April 30 and part 2 on May 7, 1987.

"On Events and LF." Center for the Study of Language and Information, Stanford University, Jan. 15, 1987.

"Design of a User Interface for Automated Knowledge Acquisition." (With Hutchins, et al.) IEEE International Conference on Systems, Man, and Cy­bernetics. Atlanta, Georgia, Oct. 14, 1986.

"SPUDS: A Natural Language Interface for Knowledge Acquisition." (With Volovik and Wolff.) 10th Honeywell International Software Conference. Plymouth, Minnesota, May 20, 1986.

"The Semantics of Referential Attitudes." Center for the Study of Lan­guage and Information, Stanford University, April 9, 1986.

"Logical Form in Government-Binding Theory." University of Minnesota Linguistics Club, Jan. 22, 1986.

"Doing Semantics Without Nets." AI Group, Martin Marietta Corp., Den­ver, Colorado, Oct. 28, 1985.

"Machine Translation Revisited." Artificial Intelligence Section, MITRE Corp., Bedford, Massachusettes, Oct. 1, 1985.

"Quantification Without Cardinality." (With David Law.) North Eastern Linguistics Society XV. Brown University, Providence, Rhode Island, Nov. 2, 1984.

"Referential Attitudes." 9th International Wittgenstein Symposium. Kirchberg am Wechsel, Austria, August 20, 1984.

"Specificity and Indefinites." 5th Groningen Round Table. Groningen, The Netherlands, June 18, 1984.