Anchor: Even if we had the will to do it, we couldn't stop killings everywhere.
Entailed: Even if we wanted to we couldn't stop all killings. 
Contradiction: We can stop all of the killings and will. 
Contradiction: two guys sit in chairs
Contradiction: That is the whole problem.
Contradiction: They all have black hair
Contradiction: Richard Brown observed that the grant review process can be difficult.