The Straussian tell: reacting to any thought by another person with even the weakest possible link to their headspace as a sign that they've read their sacred books:
Alice: Any transaction between mutually consenting adults is fine by me
Bob: Ah, you've discovered Ayn Rand
Conversation
It's a kind of functional fixedness, where they assume their path to an idea is the only path. In the most extreme cases, accusations of plagiarism and credit-stealing start to fly.
Alice: It's a nice day, let's eat ice-cream!
Bob: THAT WAS AYN RAND'S IDEA PLAGIARIST!
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