Anchor: Most use other substances as well, so it is important to be able to intervene for a variety of problems.
Entailed: It's important to know as much as possible about other substances.
Contradiction: It is only required to know about one substance.
Contradiction: I completely disagree with that.
Contradiction: A boy is at a lake with a fishing pole
Contradiction: The man is in a red plaid shirt
Contradiction: a man wairs a blue hat and glasses