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These are five (of many) verbs that effectively introduce quotations
What are argue, assert, believe, claim, emphasize, insist, observe, report, suggest, acknowledge, admire, agree, corroborate, do not deny, endorse, extol, praise, reaffirm, support, verify, complain, complicate, contend, contradict, deny, disavow, question, refute, reject, renounce, repudiate, advocate, call for, demand, encourage, exhort, implore, plead, recommend, urge, or warn?