Which statement is false?
speeches should be evaluated on both content and delivery.
the best speeches are full of logos and have very little ethos or pathos.
carefully selected rhetorical devices can add impact and memorability to a speech.
every word and gesture matters when giving a speech.

The statement that is false is :the best speeches are full of logos and have very little ethos or pathos.

Logos, Ethos, and PAthos are the 3 parts of a good speech, so without ethos and pathos, the speech lacks persuasiveness, meaning and something to grab the readers attention.

its everything except for telling nonfiction and using first person

we would need to be able to read the passage in question to determine which factor allowed david believe he could defeat goliath. post the passage, and i'd love to out.