Anchor: and the hammer came back and hit me in the thumb and blood squirted everywhere
Entailed: The hammer hit my thumb and started bleeding.
Contradiction: All my encounters with hammers have been injury-free.
Contradiction: It couldn't have possibly been half-past three, could it?
Contradiction: This problem doesn't yet have an etiquette for it, but you can ignore things you wish to ignore. 
Contradiction: two girls are swimming.
Contradiction: The group of people are going to get wet.