author
b. 1884
Best known for a concise early study of American pragmatism, this educator and scholar wrote about truth, testing, and how ideas work in practice. His surviving books point to a mind interested in both philosophy and the everyday tools of learning.

by Denton Loring Geyer
Born in 1884, Denton Loring Geyer is credited as the author of The Pragmatic Theory of Truth as Developed by Peirce, James, and Dewey, a scholarly work first published in 1914. The work grew out of graduate study and focuses on three major American thinkers—Charles S. Peirce, William James, and John Dewey.
Records also identify him as the author of Introduction to the Use of Standardized Tests, published in 1922. Taken together, these books suggest a writer whose interests ranged from abstract philosophical questions to practical problems in education.
Reliable biographical details about his personal life are limited in the sources I could confirm, so much of his story has to be traced through his publications rather than through fuller life records.