Can somebody remind me where the rumor about arguning about company proceedures came from?
I believe this version is from a publicly available police report.
From today's Wall Street Journal web page:
The situation became even more murky when it turned out that the pilots told law-enforcement officials waiting for them at the Minneapolis-St. Paul international airport that they simply got distracted by a heated discussion over company policy and lost track of where they were.
Pilots to Tell NTSB They Weren't Asleep - WSJ.com