Easy enough for me as I always have a carbon steel knife either in a belt pouch or in a pocket. I do carry at least 2 knives daily however so I will pair pouch knife and pocket knife in carbon steel pairs...
Day 1 finds a Large Cold Steel Shinobu in the pouch and a Case Peanut in the pocket.
Day 2 I will have a Medium Cold Steel Twistmaster Drop Point in the pouch and a Cold Steel Jr, Stockman in pocket.
Day 3, another Cold Steel day with an Ozark Hunter in the pouch and a Muskrat in the pocket.
Day 4 will find me with a Case CV Barehead in pouch and a Cold Steel Bird in pocket.
Day 5 will be a Camillus (Carbon V) trapper in pouch and Large CS stockman in pocket.
Day 6 Another Twistmaster, this one a Medium Bowie and an old Craftsman in the pocket.
Day 7 last day...I will go with this custom Damascus folder in the pouch and a 1930's Remington Jack in my pocket.
It is a rare day when I don't carry at least one carbon steel knife, they take such a razor edge I know even a medical emergency would find me with a sharp enough cutting instrument on hand. The pouch knives are for larger tougher chores but they too are all razor sharp. In this test I did stack things in Cold Steel, I could have easily gone with Fight'n Rooster, Case, Bulldog, etc...I really do prefer carbon steel for my knives.