Adjusting your rate of speech can make you more persuasive....

Adjusting your rate of speech can make you more persuasive. Slower speech gives someone who’s bound to disagree with you more time to evaluate your point, add in their own thoughts, and dismiss your reasoning with their own existing bias - but talking fast leaves them less time to form an argument and significantly increases your chances of persuading them. 

(Source, Source 2, Source 3)

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