When Squealer explains about the windmill at the end of the chapter, what causes animals to go along with his explanation?

The narrator tells us that Squealer "was a brilliant talker...he could black into white." When Boxer protests Squealer's explanation, saying Snowball "fought bravely at the Battle of the Cowshed. I saw him myself," Squealer says 'For we know now--it is all written down in the secret documents --that in reality he was trying to lure us to our doom." Although this is blatantly untrue, Squealer attaches Napoleon's name to the lie, and Boxer can only say 'If Comrade napoleon says it, it must be right." The text also italicizes certain words, showing how the rhythm of his language persuades the audience. When Squealer explains the new account of the Battle of the Cowshed, the narrator tells us that "Once again, this argument was unanswerable."