@incollection{ripley2011,
	author    = {Ripley, D.},
	title     = {Inconstancy and Inconsistency},
	booktitle = {Understanding Vagueness - Logical, Philosophical and Linguistic Perspectives},
	year      = {2011},
	editor    = {Cintula, P. and Ferm\"{u}ller, C. and Godo, L. and H\'{a}jek, P.},
	publisher = {College Publications},
	volume    = {36},
	series    = {Studies in Logic},
	pages     = {41 -- 58}
}