What varies with context is how well-positioned a subject must be with respect to a proposition to count as "knowing" it. Contextualism in epistemology then is a semantic thesis about how 'knows' works in English, not a theory of what knowledge, justification, or strength of epistemic position consists in.[7] However, epistemologists combine contextualism with views about what knowledge is to address epistemological puzzles and issues, such as skepticism, the Gettier problem, and the Lottery paradox.