Anchor: Metaphysics was a subject with which he wasn't yet fully prepared to cope.
Entailed: He wasn't yet fully ready to handle metaphysics.
Contradiction: He was fully qualified and ready to take on metaphysics.
Contradiction: The Internet is a very reliable and secure network because of its packet-swatched statues.
Contradiction: The dog is white.
Contradiction: Everyone has the same needs. 
Contradiction: He got off the horse.