extravalent
Operating outside of expected or designated channels, levels, or pathways of transmission. A thing described as "extravalent" is not easily classifiable, and may exhibit characteristics which alter over time. Extravelence is g-resistant, or counter-intuitive -- because it is not easily or conventionally understood, it defies rigid classification.
In the discourse of Western Philosophy, Kierkegaard's work appears uniquely extravalent among the turgid formulae of the positivists.