First, the Global Flood is not an ad hoc hypothesis. It is a conclusion. If you want to look at it from a scientific point of view, then it is a scientific conclusion.
I said
Flood Geology was an ad hoc hypothesis. Flood Geology states that all sedmentary rock (and the fossils in it) was formed during the Flood as described in Genesis 6-8.
We do not know how could the conclusion be reached.
Right here you just told us that belief in a Global Flood is
not a conclusion. If if were a conclusion, then you would know how you reached it! Conclusions are based upon evidence and logic. Since they are, we know how we got there.
So we make hypothesis to explain it.
That is different. A hypothesis to explain a Global Flood would be how there was enough water to cover the earth.
However, since the evidence already shows that the theory of a Global Flood is disproved, none of those hypotheses matter.
Many of you questioned the truth of the Flood, because you do not know what tool could be used to search for it.
Oh come now. Geologists have identified
local floods from many locations and times in the geological record. The fossils beds at Dinosaur National Park are the result of a large local flood. The tools that were used to search for and find those local floods would also find a global one.
And I am practicing on the use of a promising tool, which is to dig the origin of water on the earth.
That won't help, because you won't get enough water to cover all the earth. If you think you do, that still doesn't help because you have to figure out where the water
went. Why isn't it still there?
For the authors of Genesis 6-8, the source of the water wasn't a problem. Their cosmology had great tanks of water above the firmament and large cisterns of water in caverns below the earth. All God had to do was empty the tanks above and open up the cisterns below. At the end of the flood He simply put some water back into the cisterns and then pumped water back into the tanks.
Now that we know neither the tanks above nor cisterns below exist, there isn't enough water to have a global flood. Certainly not within human times.