Consider the following situation and explain what might be a problem with the credibility of the source or the thinking involved: you got your essay back in english class and you received a "b" on it. the girl sitting behind you, a friend of yours, also received a "b" and her boyfriend, who is another period class with the same teacher and the same subject, also received a "b." you concluded then that no one that wrote that particular assignment for that particular teacher received an "a." pitfalls in credibility?