The ordinary language basis for contextualism, and the new invariantism

I present the features of the ordinary use of 'knows' that make a compelling case for the contextualist account of that verb, and I outlive and defend the methodology that takes us from the data to a contextualist conclusion. Along the way, the superiority of contextualism over subject-sensitive invariantism is defended, and, in the final section, I answer some objections to contextualism.