“Let Φ (a physical possibility structure) be a set of distinct but intersecting paths ji–jn, each of which is a set of functions, L’s, on ordered pairs <t, w> (<time, world situation>), such that for any Ln, Lm in some ji, Ln R Lm, where R is a primitive accessibility relation corresponding to physical possibility understood in terms of diachronic physical compatibility.”
– an excerpt from David Foster Wallace’s unpublished undergraduate honors thesis, “Richard Taylor’s ‘Fatalism’ and the Semantics of Physical Modality”, via the New York Times