( Testing ( ( ( should not ) ( be ( done ( without ( ( considering ( the ( possible responses ) ) ) ( ( ( if ( ( the results ) ( are negative ) ) ) and ) ( if ( they ( are positive ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Testing)) (VP (MD should) (RB not) (VP (VB be) (VP (VBN done) (PP (IN without) (S (VP (VBG considering) (NP (DT the) (JJ possible) (NNS responses)) (SBAR (SBAR (IN if) (S (NP (DT the) (NNS results)) (VP (VBP are) (ADJP (JJ negative))))) (CC and) (SBAR (IN if) (S (NP (PRP they)) (VP (VBP are) (ADJP (JJ positive)))))))))))) (. .)))
Testing should not be done without considering the possible responses if the results are negative and if they are positive.
(ROOT (S (NP (PRP We)) (VP (VBP call) (NP (NP (DT an) (JJ incorrect) (NN test) (NN result)) (SBAR (WHNP (WDT that)) (S (VP (MD should) (VP (VB have) (VP (VBN been) (ADJP (JJ positive) (NP (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-)) (ADJP (JJ false) (JJ negative))))))))))) (. .)))