Part 7/15:
Dave counters with straightforward explanations based on the spherical Earth model, demonstrating that these phenomena—such as the midnight sun and polar day/night cycles—are naturally explained by the tilt of Earth's axis and its orbit around the Sun. These are well-documented and observed phenomena.
Key Point: The pattern of day and night, especially polar day/night cycles, are consistent with a tilted, orbiting sphere, but defy simple Flat Earth explanations.