A strong reason for wanting something to happen because you will gain from it

When a judge asks a specific person who has specific knowledge about a matter he or she doesn't know much, he or she is relying on somebody else's:

If we find two pieces of evidence which point in the same direction, we've found some

In order to be credible, evidence has to be true.

Eyewitness accounts are usually the most credible pieces of evidence

If UNICEF releases a report with information on children's malnutrition, it will be considered a credible source of information.

The strength of your evidence, and your use of it, can make or break your argument.

An argument is a group of statements some of which are offered in support of another statement, the conclusion.

Reputation is one of the credibility criteria that can be used to assess the credibility of a source.