The answer is: Expert
Expert testimony is a form of testimony that come from people who have deep knowledge and experience in a certain issue. This type of testimony usually regarded very highly in the court and has higher chance to convince the juries to a certain opinion.
(examples of expert testimony are: testimony regarding fake internet account from IT experts, testimony about violent behavior from psychologists, etc)
Connotation? it means thoughts related to a definition of a word or concept
True. he died on the cross to wash away our sins :)