# Institutio Oratoria 5.8.7

Quintilian, Institutio Oratoria, Book 5, Chapter 8. Latin.

Canonical: https://interlinea.aeterna-institute.org/library/latin/quintilian/institutio-oratoria/5.8.7

et adhuc omnium probationum quadruplex ratio est, ut vel quia est aliquid, aliud non sit; ut dies est, nox non est; vel quia est aliquid, et aliud sit: sol est supra terram, dies est; vel quia aliquid non est, aliud sit: nox non est, dies est; vel quia aliquid non est, nec aliud sit: non est rationalis, nec homo est. his in universum praedictis partes subiiciam.

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Quintilian, Institutio Oratoria, ed. Harold Edgeworth Butler. Text: the Perseus Digital Library, canonical-latinLit, CC BY-SA 4.0. Changes: apostrophes normalised and the text divided into reading sections by Interlinea.
License: CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0/). Source: https://github.com/PerseusDL/canonical-latinLit/blob/master/data/phi1002/phi001/phi1002.phi001.perseus-lat2.xml.