Contrastivism is an epistemological theory proposed by Jonathan Schaffer that suggests that knowledge attributions have a ternary structure of the form 'S knows that p rather than q'. This is in contrast to the traditional view whereby knowledge attributions have a binary structure of the form 'S knows that p'. Contrastivism was suggested as an alternative to contextualism. Both are semantic theories that try to explain skepticism using semantic methods.
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Some articles on contrastivism:
... 'Is there Evidence for Contrastivism?', forthcoming in Social Epistemology, 2007 ... “From Contextualism to Contrastivism,” Philosophical Studies 119 (2004), 73-103 Schaffer, J ... Theories Causal theory of reference Contrast theory of meaning Contrastivism Conventionalism Cratylism Deconstruction Descriptivist theory of names Direct reference theory ...