Your refusal to properly address the points in his post lend credence to the accuracy of that information and also indicate a fear on your part to actually confront the "evidence". Even the lowliest peasants can see that.
Another piece of evidence against the Grand Canyon being carved by flood outflow is that everyplace where you have a meandering river in a flat area -- say the Mississippi, for instance -- and you have a flood, the flood waters cut across the meanders during the flood, straightening the river course, plugging the ends of the old meanders with sediment and creating "oxbow" lakes" ... there are no such oxbow lakes or abandoned watercourses in the Grand Canyon, meaning that there was never water high enough to cut across a meander section, even though some of the peninsula's formed by the meanders are lower than the canyon rims.