The 2-witness-rule ist the "truth".
The "truth" is the truth (for a JW).
As we watched during the last ARC session #54, no JW can accept,
that the "truth" has to be changed. If the "truth" must be changed, it wasn't the truth.
It's like talking with JW's about their doctrines - it's like talking to a wall.
If they change the 2-witness-rule for the ARC - they admit, that the past 65 years the "truth" (about the 2-witness-rule) wasn't the truth.