Incomplete question. However, I answered from a general research perspective.
Step-by-step explanation:
What role do sources play in validating an argument?
Well, the term source basically refers to the originator of any information. We have sources that are considered credible sources (like Encyclopedia, Journal Magazine, Newspaper, etc) and others that are considered incredible sources (general social media post). Knowing the kind of source could thus help validate an argument.
Relying on the internet to provide complete and truthful information is difficult considering the amount of fake news available today.