Anchor: In a given test, all organisms should be approximately the same age and should be taken from the same source.
Entailed: All organisms should come from the same place and be approximately the same age in a given test.
Contradiction: It is not necessary to take organisms from the same source and age when conducting a test.
Contradiction: I bet she knows. 
Contradiction: Several men are indoors
Contradiction: Two people are watching a concert outside.
Contradiction: I have not lived in Alabama since 1965.