Anchor: well it's not only that but i've read different articles and they said even the even the best of labs they come back with erroneous samples and even if they get a a reading i guess they test the same sample again
Entailed: Samples are sometimes tested more than once. 
Contradiction: Each sample is only tested once. 
Contradiction: People sitting on benches in the mall.
Contradiction:  Children in Martial arts uniforms having fun.
Contradiction: Yardley has solid evidence such as footage of Exley performing fellatio on a man.
Contradiction: A lady uses her computer.