Anchor: Don't buy any unless you are an expert or have one with you.
Entailed: You need to have an expert with you if you want to buy one.
Contradiction: Even if you're a novice, you should still buy one.
Contradiction: the man is rolling down the hill
Contradiction: There is a fountain outdoors.
Contradiction: There is a privacy law if you're a technological determinist.
Contradiction: So if you know the place you're buying you car from...