Anchor: What this indicates is that erections--satisfying erections--don't reside solely in the groin.
Entailed: What this means is that erections aren't just in the crotch.
Contradiction: What this means is that erections are just in the crotch.
Contradiction: The objects landed soundlessly against the metal. 
Contradiction: Retiring the PP provides substantive evidence.
Contradiction: A woman with blue eyes is covering her face with a fan.
Contradiction: This method is definitely not easy.