Jonathan Jenkins Ichikawa is an assistant professor of philosophy at the University of British Columbia; he did his graduate work at Brown University and Rutgers University and post-doctoral work at the Arche Research Centre in St Andrews. He works primarily in epistemology and philosophical methodology; he has written papers on dreaming, imagination, knowledge and knowledge attributions, intuitions, and experimental philosophy.

Benjamin W. Jarvis received his PhD in philosophy from Brown University in 2010, taking up a permanent lectureship in philosophy at Queen's University Belfast that same year. He works primarily in epistemology and the philosophy of mind and cognitive science and has published papers on belief, mental representation, knowledge, and truth.

"...a dense and ambitious book whose principal aim is to defend the view that philosophical inquiry is a priori inquiry into essential natures. The book covers a broad range of philosophical issues spanning the philosophy of mind and language, the epistemology of metaphysical modality and the philosophy of philosophy. It will be of considerable interest to many, since there is something in it for just about everyone." -- Analysis