When a source presents its findings with confidence, or when the evidence is convincing, use a strong reporting verb. Assert and maintain say the writer states something firmly; emphasize says they stress its importance. These are far more precise than a plain "say".
Reporting a confident claim
assert /əˈsɜrt/ — The researchers assert that the correlation is statistically significant.
maintain /meɪnˈteɪn/ — The author maintains that early intervention reduces later costs.
emphasize /ˈɛmfəsaɪz/ — The report emphasizes that the results are significant, not incidental.
Not ""The author says that the results are important." (flat verb: the reader learns nothing about the stance)" — say ""The author emphasizes that the results are substantial." (precise verb; the point is being stressed)". Swap the flat says for a verb that shows the stance, like emphasizes. These verbs also tell the reader what you think: argues, asserts, maintains, claims report the position without committing you to it (maintains even hints they are holding out against the evidence), while shows, demonstrates, finds say you accept it.
Try it: The team states this firmly, against several critics, but offers no new data, and you don't want to sign up to it yourself. Which reporting verb fits? (The team asserts that the treatment works. / The team suggests that the treatment works. / The team demonstrates that the treatment works.) Answer: The team asserts that the treatment works. — 'Asserts' reports a firm claim while keeping your distance from it, which is exactly right when they offer no new data. 'Suggests' would make their firm claim sound tentative, and 'demonstrates' would mean you accept it as proven, the one thing you don't want to say here.
Reporting a cautious claim
When a source is speculative or careful, use a cautious verb so you don't overstate it. Suggest reports a conclusion the source draws tentatively; it is what the results point to after the work. Hypothesize names what a study proposes before testing it, so the two are not swappable. Imply is different again: it says the source did not state the point, and that you are reading it out of their argument. That can sound like a criticism, so use it only when you mean it.
suggest /səgˈdʒɛst/ — The author suggests that cultural factors may play a role.
hypothesize /haɪˈpɑθəsaɪz/ — The study hypothesizes a link between diet and cognitive performance.
imply /ɪmˈplaɪ/ — The authors never discuss the sample size, but their conclusion implies that it did not matter.
Not ""The study asserts that there might be a connection." (firm verb clashes with a tentative claim)" — say ""The study suggests that there might be a connection." (hedging verb matches the tentative claim)". Match the verb to the source's certainty. When the claim is soft ("might be"), reach for suggests, not the confident asserts, and not implies, which would say they never made the claim at all.
Try it: The claim is cautious: the writer thinks a link is possible but hasn't proven it. Which sentence reports that correctly? (The paper suggests that stress may worsen recovery. / The paper asserts that stress may worsen recovery. / The paper confirms that stress may worsen recovery.) Answer: The paper suggests that stress may worsen recovery. — 'Suggests' keeps the claim tentative, which fits the hedge 'may'. 'Asserts' would signal confidence the source doesn't have, and 'confirms' claims the point is proven, both of which contradict a cautious 'may worsen'.
Try it: You want to report that a source stresses the importance of a finding. Which verb captures that? (The review emphasizes the need for longer trials. / The review hypothesizes the need for longer trials. / The review notes the need for longer trials.) Answer: The review emphasizes the need for longer trials. — 'Emphasizes' says the source is stressing this point, which is exactly the stance described. 'Hypothesizes' would frame it as an untested guess, and 'notes' is neutral and flat, so neither conveys that the source is underlining the point's importance.