The doctor is . . . skeptical about the Affordable Care Act. And clueless, too. A new survey shows that an overwhelming percentage of physicians don't believe that their states' new health insurance exchanges will meet the Oct. 1 deadline for those key Obamacare marketplaces to begin enrolling the uninsured. Just 11 percent of doctors believe those exchanges will be open for business that day. But those doctors, by a wide margin, also said they are 'not at all familiar' with how a number of important aspects of those exchanges and plans offered on them will work—aspects that will directly affect their bottom lines.