un
pro
va
ble
1
(of a thing) very hard or impossible to demonstrate its truth or validity
- The claim that the company will succeed is unprovable at this point.
- His theory about the origins of the universe is unprovable with current technology.
- Some unprovable ideas are still widely discussed in philosophical circles.
- The authenticity of the artifact remains unprovable.
- The accusation was unprovable, and no charges were filed.