Full Idea
The great rival to contextualism is classical 'invariantism' - invariantism about the truth-conditions [for knowing], combined with variable standards for warranted assertability.
Gist of Idea
Classical invariantism combines fixed truth-conditions with variable assertability standards
Source
Keith DeRose (The Case for Contextualism [2009], 1.12)
Book Reference
DeRose,Keith: 'The Case for Contextualism' [OUP 2009], p.27
A Reaction
That is, I take it, that we might want to assert that someone 'knows' something, when the truth is that they don't. That is, either you know or you don't, but we can bend the rules as to whether we say you know. I take this view to be false.