Happy Birthday, Massimo Pigliucci

If you reject the theory of evolution, or think that there is such a thing as alternative (as opposed to evidence-based) medicine, or claim without evidence that aliens are visiting the planet, or think that the stars influence human destiny, and so on, you are anti-science and live in a dream world with no connection to reality. More damning, you are engaging in the ultimate act of arrogance: to declare something true or untrue not because you have reason or evidence, but only because it makes you feel better. May I suggest that you need a good dose of humility, and that one way to get it is to admit that the universe is not about you, and that some people out there really know more than you do, as unpleasant a thought as this may be?

--Massimo Pigliucci, "Intellectual Arrogance" (2008)

How seriously should we take Hume's skepticism?

The Treatise of Human Nature has given David Hume a reputation for being the arch-skeptic. After beginning his work with the goal of detailing a "science of man" he proceeds through the argument to undercut our confidence in the reliability of the senses, the objectivity of our notions of space and time, the reality of causal laws, and the rationality of our beliefs. By the end of Book I, he seems to have devastated human knowledge and beliefs, leaving us with the mere shell of skepticism. But then, paradoxically, he proceeds to write two more books in the Treatise as well as many other works in which these considerations appear to be largely ignored. So the question becomes: how seriously should we take Hume's skepticism?