1. the action or process of reasoning systematically in support of an idea, action, or theory
2. a set of reasons or a logical basis for a course of action or belief

Examples

• The lawyer’s argumentation was clear and persuasive.
• Students learned the principles of effective argumentation in debate class.
• Her argumentation relied heavily on statistical evidence.
• The essay lacked strong argumentation to support its main thesis.
• Scientific argumentation requires careful analysis of data.
• The professor critiqued the flaws in their argumentation.
• Good argumentation involves addressing counterarguments.