Dubium
Dubium est status ubi mens inter binos propositiones contradictorias suspensus manet, utro annuere nequiens. Animi motus dubitans inter fidem et incredulitatem vacillat. Dubium dubitationem, diffidentiam, vel inopiam certi facti, actionis, vel sententiae implicat, notionem realitatis perceptae interrogat, et propter curam de erratis vel culpis vel convenientia actionem appositam demorari vel reicere conari potest.

 Cogito ergo sum
 Dubium rationabilis
 Fallacia
 Fides
 Ignorantia
 Logica
 Paradoxum
 Quaestio
 Scepticismus
 Scepticismus philosophicus
 Scepticimus scientificus
 Thomas dubitans
 Veritas

Notae

Bibliographia 
 Berger, Peter L., et Anton Zijderveld. 2009. In Praise of Doubt: How to Have Convictions Without Becoming a Fanatic. Novi Eboraci: HarperOne. ISBN 978-0-06-177816-2.
 Hecht, Jennifer Michael. 2003. Doubt: a history: the great doubters and their legacy of innovation from Socrates and Jesus to Thomas Jefferson and Emily Dickinson. Franciscopoli: HarperSanFrancisco. ISBN 0-06-009795-7.
 Hein, David. 2006. Faith and Doubt in Rose Macaulay's The Towers of Trebizond. Anglican Theological Review 88(1):47-68. ISSN 0003-3286.
 Hönigswald, Richard. 1914, 2008. Die Skepsis in Philosophie und Wissenschaft. Nova editio, ed. cum praefatione Christiani Benne et Thomae Schirren. Gottingae: Edition Ruprecht. ISBN 978-3-7675-3056-0.
 Marquard, Odo. 1994. Skepsis und Zustimmung: Philosophische Studien. Stutgartiae: Reclam.
 
 Sommer, Andreas Urs. 2007. Die Kunst des Zweifelns: Anleitung zum skeptischen Philosophieren. Ed. 2a. Monaci: C. H. Beck.
 Walther, Elisabeth, ed. 1985 Die Festigung der Überzeugung und andere Schriften. Francofurti: Ullstein. ISBN 3-548-35230-8.

Nexus externi 

Animi motus
 
Epistemologia
Scepticismus