And so, the Israelis continue to hold the world record for most tanks flipped over, how they do it remains a mystery!
Madness string 82089
The burden of proof lies on those claiming that something is the case. They must show it to be true, that the thing exists. If they cannot, then it is assumed that it is not true. But a negative, that there are no examples of the thing existing, cannot be proven directly. It can only be disproven.