
A charismatic mathematics professor vanishes mid‑lecture, leaving only a chalk‑covered board, a watch, and a monogrammed belt as clues. The baffling disappearance triggers a police investigation that quickly stalls, while the university offers a modest reward for any lead. As students and faculty recall his last words about a “logical variable” hidden in integration, the event spirals into a deeper question: what if reality itself refuses to obey conventional logic?
Martin Grant, a former confidant of the missing professor, becomes obsessed with a conversation they shared about a controversial theory of the universe’s underlying nature. He revisits the puzzling dialogue, hoping it might explain the inexplicable, and finds himself confronting the uneasy boundary between belief and disbelief. The story weaves together academic intrigue, philosophical speculation, and a haunting mystery that challenges listeners to wonder how far the mind can stretch the limits of what we accept as real.
Language
en
Duration
~1 hours (91K characters)
Publisher of text edition
Project Gutenberg
Credits
Produced by Greg Weeks, Mary Meehan and the Online Distributed Proofreading Team at https://www.pgdp.net
Release date
2010-06-02
Rights
Public domain in the USA.
Subjects

1909–1965
A lively early science fiction writer and editor, he helped shape the feel of pulp-era magazine SF with fast-moving stories and a strong presence in fan culture. He wrote under several names and became especially associated with The Hounds of Hell and the long-running "Club House" feature in Amazing Stories.
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