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Use "kneejerks" in a sentence
"It seems that they are as many kneejerks without the knee as on a creationist site."
"TPM used to have the best comments from its readers. things would get heated to be sure and could on occasion get ugly but the kneejerks and the vitriolic proselytizers were the exception not the rule."
"SO did the audience show up to listen and think, or to tweet kneejerks?"