The decision stems from a lack of clarity regarding how prominently the religious text would be displayed, whether teachers would reference the Ten Commandments during lessons, or if other historical documents, such as the Mayflower Compact or the Declaration of Independence, would also be exhibited, the majority opinion noted.

This is absurd. The legal standard is to assume the government will abuse vagaries in the law to violate the Constitution. So the lack of clarity/specificity is itself sufficient reason for an injunction and ultimately striking down the law.