How many times has the blood liquified?
After liquification, how many times has disaster occurred?
If it's more than five (the times disaster has occurred when the blood has not liquified), I don't see this event as a predictor of catastrophe or beneficence.
If the data is not available, I'm suspicious.
Oh yes public prophecy v. private prophecy should we even be discussing this, as it is not required by the Church. I am being sincere in the question.