If one or either of them drops below the value of BTC pre-split, then no. No one knows what will happen, and assuming they'd not drop by the difference of pre-s

If one or either of them drops below the value of BTC pre-split, then no. No one knows what will happen, and assuming they'd not drop by the difference of pre-split is definitely not guaranteed, especially if you consider the pre-split price highly inflated. Note I follow CC a little bit more than casually, no expert and I'm not sure what the GP means exactly by this statement.