Slate, horn, wool, and wood were always used to make tools and implements, but these materials are now also being used in the production of interesting souvenirs.
Wool and wood have never been used in toolmaking.
mnli hypothesis: Wool and wood have never been used in toolmaking. premise: Slate, horn, wool, and wood were always used to make tools and implements, but these materials are now also being used in the production of interesting souvenirs.