David I. Beaver is an Associate Professor of Linguistics and Philosophy at the University of Texas at Austin. He is the author of Presupposition and Assertion in Dynamic Semantics (2001); is co- editor of several books, including The Construction of Meaning (2002); has authored numerous articles for prestigious journals including Linguistics and Philosophy and Language; is on the editorial team or board of all the three leading journals in semantics; and is co-founder of a new Open Access journal, Semantics and Pragmatics.

Brady Z. Clark is an Assistant Professor of Linguistics at Northwestern University and a faculty member at the Northwestern Institute on Complex Systems. He is co-editor (with Beaver, Casillas- Martinez, and Kaufmann) of The Construction of Meaning (2002). His many publications range from Semantics to Historical Syntax and Tutorial Dialogue Systems, and include articles in Natural Language Semantics and Language.