A claim should be backed up by ONLY your reasoning.

Yep, sounds right!
Nope, you need other stuff!

Nope, you need other stuff! A claim should be backed up by evidence, such as facts, data, research studies, or expert opinions. Pure reasoning may be subjective and lack the necessary support to convince others. Including external sources and supporting evidence strengthens the credibility of a claim and enhances its persuasive power.