The carvings on the cabin have lost lustre (faded) long before , the slates on the road have been outworn to their slipperiness by to-and-fros of generations.
This week we're getting into conspiracy theories and the slipperiness of the concepts that philosophers have to work with when they apply rigorous thought and analysis to conspiracy theories.
Several theoretical and experimental studies in the last few years have found the real cause of ice's slipperiness — that thin layer of liquid water on the surface, it isn't really liquid water at all.