We don't have the data in front of us to actually prove your point one way or the other. Resulting to name calling and hyper emotional responses doesn't elicit the behavior of cooperation. Instead, engage on data and facts.

If you said "He's making statements without any data to back up his claims" I'd respond, at this point you're correct, we do not have the data to verify. Collectively we could ask for more transparency. The result is we agree more data is needed.