To them their conscience is clear.
If something is wrong then
1. It is not the proper time for it to be clarified
2. It's not a problem, they are imperfect
3. The answer is to wait on Jehovah to clarify matters
4. In the meantime, they are showing humility by accepting the first 3 points.
5. If they personally believe something is incorrect but not agreed upon by the greater majority of GB members, then the first four principles apply.