Article summary
This paper asks whether partisan disagreements about political facts reflect sincere motivated reasoning or mere partisan cheerleading. Using incentivized survey experiments that let respondents search for answers and matching web‑browsing data, the authors show that cheerleading modestly inflates factual gaps but does not account for them. Partisan differences in information search persist under incentives and in natural browsing, consistent with the interpretation that partisans prefer congenial information and often hold inaccurate, party‑favorable beliefs.