The way to make a concept impregnable is to use rhetorical devices to render competition out of bounds, and then nationalize the favored view. An AP story demonstrates how this is done with evolution.
Today's transit of Venus, in which our sister planet appears to cross the disk of the sun, will be the last till 2117. As observatories and millions of people watch the rare planetary alignment, few may know the stories of astronomers who predicted them and explorers who risked life and limb to observe them.
Should you trust the diagnosis of a psychiatrist? If it helps, individuals are free to choose. Behind the scenes, however, there are severe, deep-seated debates about whether psychiatrists understand disorders, let alone diagnose them properly.