I want to know the answer to the following question:
Even if a prayer is non-denominational it's still considered what?
All the background I'm provided with is that "In Engel v. Vitale, 370 U.S. 421 (1962), the Court, by a vote of 6-1, determined it unconstitutional for state officials to compose an official school prayer and require its recitation in public schools, even when the prayer is non-denominational and students may excuse themselves from participation.". Is that enough to answer the question?
Answer: yes