The universal credibility problem with polling is that wordsmithing and mathematics don't mix, and never will.
( ( ( The ( universal ( credibility problem ) ) ) ( with polling ) ) ( ( is ( that ( ( ( wordsmithing and ) mathematics ) ( ( ( ( ( ( do n't ) mix ) , ) and ) never ) will ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ universal) (NN credibility) (NN problem)) (PP (IN with) (NP (NN polling)))) (VP (VBZ is) (SBAR (IN that) (S (NP (NN wordsmithing) (CC and) (NNS mathematics)) (VP (VP (VBP do) (RB n't) (VP (VB mix))) (, ,) (CC and) (ADVP (RB never)) (VP (MD will)))))) (. .)))
Mathematics is the most important aspect of polling.
( Mathematics ( ( is ( ( the ( ( most important ) aspect ) ) ( of polling ) ) ) . ) )
(ROOT (S (NP (NNS Mathematics)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (JJ important)) (NN aspect)) (PP (IN of) (NP (NN polling))))) (. .)))