Anchor: I then had to remember where on my hard drive I had put the install files.
Entailed: I needed to remember where the files were saved on the hard drive. 
Contradiction: I needed to remember where I put my keys. 
Contradiction: The children are eating PB&J sandwiches inside their kitchen.
Contradiction: The replacement rate can be computed by netting out Social Security taxes. 
Contradiction: a boat in the deep sea
Contradiction: Four people are riding horseback