The answer is: making sure a conclusion is accurate by checking several sources.
Explanation:
"Corroboration" is a process o<em>f proving a proposition, statement or idea with the help of an evidence.</em> Its purpose is to secure people when it comes to unreasonable sources of evidence (especially when such evidence is used against them).
The skill of corroboration is making sure a conclusion is accurate by checking several sources. This means that it tries to confirm whether the initial evidence is indeed valid, true or verifiable.
