Credibility of Answers.

Hello everyone. I am a student in the English Language, and Literature Department in a College, and I would appreciate it so much those professional people here to answer me whether the answers are credible or are answered by a random person who is not specialist. I am asking because I am thinking to participate in this website, and I would like to thank you if you answer me about the credibility of answers here whether they are written by a specialist or a random person that could be not native speaker so I question the credibility of these forums.

Thanks.