argumentum

/ˌɑrɡjəˈmɛntəm/
noun
  1. An argument or line of reasoning, especially in formal logic or rhetoric.
    • The lawyer's argumentum relied on a chain of logical deductions.
    • In his essay, he used an argumentum ad hominem instead of addressing the facts.
    • The philosopher presented an argumentum that was difficult to refute.
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