I forgot that this was religion, but are we required to accept un sourced WWII statistics as facts, when badgered to?
saradippity made his post to me on WWII history and I requested his source for the statistic, that is badgering?
If the poster cannot or will not answer your question after a few attempts, then it is sufficient to declare your point and move to something else. In this case, you might say "Since you have not provided a source in response to my requests, the statement that blah will be presumed false."