Anchor: With material of infinite strength--and an infinite supply of it--and with infinite time and patience, it might have been worth considering.
Entailed: It might be worth thinking about if there was a an infinite supply of infinitely strong material.  
Contradiction: It would not be worth it no matter what our supply status is.  
Contradiction: Two teenage girls play with legos.
Contradiction: Two dogs are moving through the grass
Contradiction: Everybody knew that she would be in the house.
Contradiction: A human is holding an object in front of food.