Q. 4. What is the meaning of the word Trinity, so commonly used in expressing this doctrine?
A. It signifies the same with Tri-unity, or three in one; that is, three distinct persons, in one and the same individual or numerical essence, 1 John 5:7. James Fisher; Catechism on the Catechism, Q. 6
What proof texts would a CTer use to defend Fisher's answer here?
This is not the thread to argue for or against the CT, BTW.