Anchor: However, modern production methods, including thin artificial canvas and gaudy synthetic colors, saw them lose favor.
Entailed: Gaudy synthetic colors are among the modern production methods.
Contradiction: They gained favor thanks to modern production methods.
Contradiction: It is not a problem,
Contradiction: The warriors were enslaved. 
Contradiction: I have seen every thing, but I don't watch TV.
Contradiction: He was divorced.