We find there words related to argumentation (argue, claim), or studies and polls (found,  ures (DR., Clinton, W. Bush) or court orders (supreme, v. 8 ).
when subtracting the true convincing distribution from the true nonconvincing distribution (Figure 2b) one gets opinion words (support, opposes, vote), partial change (reduce, amend, part), non-emphasized actions (said, proposed, concern).