I believe that radiation and it’s effects can be measured and viewed repeatedly, by different people, with the same results.
If there is no logic or reason available, then what makes anyones’s belief, any more or less valid than anothers? I believe God speaks to each individual as He sees fit.
There is logic and reason available. Even the cancer patient with 20 malignant tumors on his kidneys knows the source even if he can't prove it. It just a matter of what he knows to be true based upon what has been revealed to him.