Sounds like Circular Reasoning (or circular logic).
Jehovah is omniscient, infallible, etc.
Therefore, the present truth from Jehovah is always the truth.
from Wiki, a definition:
- Circular reasoning is not a formal logical fallacy but a pragmatic defect in an argument whereby the premises are just as much in need of proof or evidence as the conclusion, and as a consequence the argument fails to persuade.