So now you need to prove the glaciers grew, without retreating, for 800,000 years or more.
So, your official position is
"The glaciers that dug out the Great Lakes were 2 miles high, but younger than 800k years old, because I believe the ice on Antarctica was formed in the last week or two..."
My position is
Those glaciers that dug out the Great Lakes originally formed further north and moved south. By the time they get to 2 miles high, they are more than 10 million years old"
So essentially our disagreement is over the age of 2 mile high glaciers - I think they are over 10 million years old, and you think they are a few days old, since you learned your climate science by watching "Day after Tomorrow."