Reasons- a cause, explanation, or justification for an action or event Claim- state or assert that something is the case, typically without providing evidence or proof Formal- done in accordance with rules of convention or etiquette; suitable for or constituting an official or important situation or occasion. Argument- an exchange of diverging or opposite views, typically a heated or angry one Evidence- the available body of facts or information indicating whether a belief or proposition is true or valid Conclusion- the end or finish of an event or process Credible- able to be believed; convincing.