Depression may be challenging to assess in a patient with dementia. In patients with AD, the presence of depression may range from 6% to 30%, depending on the diagnostic criteria employed (Cummings et al., 1995). The prevalence and course of depression in dementia are controversial, due to several confounding factors.
Astronauts use space shuttles(trasport people and equipment), Space probes (robotic exploration, Spacecrafts (trasport crew, equipment, and other technologies).
3. Different shadow lengths. Some people point out that some of the shadows given off by the astronauts are different in length, even though they might be standing close to each other. This might suggest that a faulty lighting system was set up on a stage somewhere, and NASA failed to notice any inconsistencies.