Evidence
Evidence was an indication that something else existed or was true. It referred to facts and pieces of information and was suggestive.

In 2265, during a briefing in which the mutating Gary Mitchells abilities were the subject of discussion, Spock asked Doctor Elizabeth Dehner if she had seen evidence of unusual extrasensory perception powers. She offered as evidence that Mitchell could control certain autonomic reflexes and could read very fast and retain more than was usual of what he had learned from reading. ()

See also 
 Clue
 Proof

External link 
 
Philosophy