Publications
“Report 3Rd Workshop In The Philosophy Of Information”. The Reasoner 1: 6-7.
. 2011. 
“An Exact Truthmaker Semantics For Obligation And Permission”. Deontic Logic and Normative Systems: 2016.
. 2016. 
“An Empirical Investigation On Scientific Observation” . Theory of Knowledge and Science Policy: 3–36.
. 1979. “Russell's Set Versus The Universal Set In Paraconsistent Set Theory”. Logique et Analyse 25: 121–133.
. 1982. “Groepsbeslissingen: Kwaliteit, Autoriteit En Vertrouwen”. Tijdschrift voor Filosofie.
. In Press. 
“Radicaal Atheïsme” . Wat met God?: 129–162.
. 1999. 

“Zero Logic Adding Up To Classical Logic”. Logical Studies 2: 15.
. 1999. 
“Two, Many, And Differently Many” . The Road to Universal Logic. Festschrift for the 50th Birthday of Jean-Yves Béziau II: 213–242.
. 2015. 
“The Theory Of The Process Of Explanation Generalized To Include The Inconsistent Case”. Synthese 143: 63–88.
. 2005. 
“Logics For Qualitative Inductive Generalization”. Studia Logica 97: 61–80.
. 2011. 

“Over De Stand Van Zaken In De Carnapiaanse Inductieve Logica”. Communicatie en Cognitie 6: 29–57.
. 1969. “De Zin Van Leo Apostels Atheïstische Religiositeit. Een Kennistheoretisch Commentaar. Woord Vooraf”. Atheïstische Spiritualiteit: 9–21.
. 1998. 
“On The Epistemological Justification Of Pluralism And Tolerance”. Philosophica 65: 33–54.
. 2000. 
“Outline Of A Theory Of Meaning: Semantical And Contextual”. Philosophica 19: 137–154.
. 1977. “The Role Of Logic In Philosophy Of Science” . The Routledge Companion to Philosophy of Science: 47–57.
. 2008. 
“The Adaptive Logic Of Compatibility”. Studia Logica 66: 327–348.
. 2000. 
“Een Ontroerend Intens Streven Naar Kennis, Naar Beleving En Naar De Eenheid Van Beide” . Leo Apostel. Tien filosofen getuigen: 135–157.
. 1996. 
“Dialectical Dynamics Within Formal Logics”. Logique et Analyse 29: 161–173.
. 1986. “Inconsistency-Adaptive Logics” . Logic at Work. Essays Dedicated to the Memory of Helena Rasiowa: 445–472.
. 1999. 
“A Strengthening Of The Rescher–Manor Consequence Relations”. Logique et Analyse 46: 289–313.
. 2003. 

“On The Transparency Of Defeasible Logics: Equivalent Premise Sets, Equivalence Of Their Extensions, And Maximality Of The Lower Limit”. Logique et Analyse 207: 281–304.
. 2009. 

“Nicholas Rescher's Coherence Theory Of Truth”. Logique et Analyse 16: 393–411.
. 1973. “Onze Huidige Kijk Op Ontdekking En Creativiteit Vereist Een `contextuele' Kennistheoretische Aanpak” . Gehelen en fragmenten. De vele gezichten van de filosofie: 265–267.
. 1993. 
“Inconsistencies And Beyond. A Logical-Philosophical Discussion”. Revue Internationale de Philosophie 200: 259–273.
. 1997. 
Frontiers Of Paraconsistent Logic. Baldock, UK: Research Studies Press.
. 2000. Frontiers of Paraconsistent Logic 