Dinges (2015) defines invariantism as the position that knowledge sentences express a proposition that does not vary with the epistemic rules of the contexts in which such sentences should be used. For this reason, actions, utterances, and expressions are only understood depending on the contexts in which they are applied.
Dinges, J. (2015). EPISTEMIC INVARIANTISM AND CONTEXTUALISTS INTUITIONS. Retrieved from https://www.cambridge.org/core/journals/episteme/article/epistemic-invariantism-and-contextualist-intuitions/0FA0F1E069E0F95DEEFC90EB200207FA