We have seen that there is more than sufficient evidence from the surrounding context to determine that “all” in Genesis 7:19 clearly refers to the entire globe. The local Flood advocates have yet to demonstrate from the context of Genesis 6–9 that “all” in no way can mean the entire globe. Instead, they rely on an argument based on a fatal hermeneutical flaw that ends up doing damage to the perspicuity of Scripture, rather than enhancing our understanding of it.
One final question must be asked. If Moses, the author, wanted to make it any clearer that the Flood covered the entire globe, what else could he have said? What more could he have done? He told us:“And the water prevailed more and more upon the earth, so that all the high mountains everywhere under the heavens were covered” (Genesis:7:19). It seems there is nothing more that could have been said to show us that the Flood covered the entire Earth. In the end we must ask ourselves, do we believe Moses? Christ said in John:5:46–47, “If you believed Moses, you would believe me, for he wrote about me. But, since you do not believe what he wrote, how are you going to believe what I say?”
—John D. Morris (Young Earth Creationist, Professor of Geology, president emeritus of the Institute for Creation Research).