99.9% of JWs would accept it
And you are also right that JW and lot of of other people just believe things without truly understanding it but belief does not mitigate truth nor validate it.
Let’s say hypothetically that you witnessed an event and you know with certainty that the event occurred because you measured it. And you draw certain conclusions from what you experienced. Your conclusions derived from your measurement might be wrong but you know that the event is real.
Even if in court your conclusions are debunked and even if the event itself was proven not to have occurred, nobody is going to unconvince you. You know what you know although you accept your mistake about your conclusions.