This is a serious question. The other 4 liberal justices were probably cretins from birth and their actions are more understandable. Roberts, on the other hand, was made into chief justice because at some point in his life, he had shown himself to be competent. Now, with the recent Arizona ruling and this incomprehensible Obamacare dribble, there is good reason to question his competence. Has he become demented?
Dementia can be a consequence of various long standing illnesses. During the past century, latent syphilis was one of the most common causes of dementia and it still remains an important cause of mental degeneration. Other common conditions that adversely affect one's brain include drug abuse, uncontrolled hypertension, and strokes. Alzheimer's usually affects someone older, but it can also occur in people who reach Roberts' age.
In any case, does the ruling of someone mentally unfit for the job have any merit? The only reason to obey this insanity is the threat of violence from the federal tyranny. That is not a sign of a lawful society. Instead, it is a sign of a lawless society governed by violent thugs. If history is to be believed, there is only one way to end the tyranny of violent thugs. Prepare for the worst.