Final answer:
Dr. Welling's theory is not credible due to a lack of credible evidence, unclear ideas, inadequate media support, and flawed reasoning. It does not align with findings from cultural anthropology and fails to convince rational thinkers.
Step-by-step explanation:
Dr. Welling's theory is considered not credible because it lacks supporting evidence from credible sources, presents ideas that are unclear and disconnected due to insufficient transitions, and fails to provide a definitive conclusion. Moreover, any media or visual aids presented in support of the theory are either inadequate or show little relevance to the core ideas presented. The inconsistencies and lack of persuasive evidence against established scientific perspectives contribute to its lack of credibility.
Furthermore, a philosophical theory that contradicts findings by cultural anthropologists and contains enough evidence against it to sway rational careful thinkers will be viewed skeptically. The comparison with the initial resistance to the continental drift hypothesis shows that scientific skepticism is often warranted and crucial until sufficient evidence and mechanisms are understood. Unlike Wegener's hypothesis, which eventually gained acceptance, Dr. Welling's theory suffers also from flawed reasoning, as indicated by the example of faulty cause-and-effect in how evidence is presented and interpreted.