Abstract
Professors Richard Fumerton, Ausonio Marras, and Walter Sinnott-Armstrong have provided valuable and challenging examinations of The Architecture of Reason, and I am grateful for their work in producing these critiques and for the insight and ingenuity they exhibit in pursuing some of the difficult issues. In the space I have, I cannot do full justice to all the questions and problems they raise, but I will indicate along what lines the resources of the book provide for responses that may advance understanding of the topics in question. I will discuss the essays in the order that seems most natural given the overall picture of my account these replies are intended to sketch.