Anchor: Then I found that I'd forgotten the latch-key after all. 
Entailed: I thought I had the latch-key but later realized I had forgotten it.
Contradiction: I had the latch-key in my pocket the whole time.
Contradiction: Two men are playing golf.
Contradiction: Two people are outside in the snow.
Contradiction: A white dog stands near a metal post.
Contradiction: There are multiple people present.