The way it was explained in court was as an alternative to evolutionary "theory," not as a way to explain the Big Bang. ID holds that the organisms on this planet are simply too complex to have developed into what they presently are through natural selection. They even came up with a specific example to use in court that they thought was unique and complex, and thus the perfect thing to make their argument with. The problem was that it wasn't, and real scientists knew that and blew their example clean out of the water. ID isn't science, it's a matter of faith and personal philosophy. Normally this wouldn't be a problem, but it becomes one when it's being pushed forward as science in the classroom. Not only does it violate the very essence of what science is, but it violates the first amendment: "Congress shall make no law respecting an establishment of religion..." Requiring public schools to include ID in their curriculums would be violating that part, the first part, of the First Amendment that this nation's founding fathers set down for us. This is the Bill of Rights we're talking about here, and that is the first tenant in it. That med it incredibly easy for the judge to rule against that Kansas school board that caused all this uproar.