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1. A discussion in which reasons are advanced for and against some proposition or proposal
   "the argumentation over foreign aid goes on and on";
   - argument, debate
    
2. A course of reasoning aimed at demonstrating a truth or falsehood; the methodical process of logical reasoning
   "I can't follow your argumentation";
   - logical argument, argument, line of reasoning, line

Derived forms: argumentations

Type of: abstract thought, discussion, give-and-take, logical thinking, reasoning, word

Encyclopedia: Argumentation