Anchor: In August 1994 Castro suddenly lifted restrictions on those wishing to leave (coastal patrols usually force potential emigres to return).
Entailed: Castro lifted restrictions in 1994.
Contradiction: Castro lifted restrictions in 1944.
Contradiction: eBay doesn't generate any data and it's unlikely that these theories will be the stuff of doctoral theses.
Contradiction: The floor has graffiti.
Contradiction: balls are flat
Contradiction: Customer involvement makes executives aware of expectations.