Dr. Ede's excellent post can be found here.
I am not an expert but some of those comments I've read on Dr. Ede's post are completely hilarious. I live on the Canadian prairies. I dare you to go out and forage for plants even now in April as we have snow on the ground at the moment. Now going further north by 1500 km to Yellowknife NWT which is as far as public transportation (air not roads) will take you, you will find you're still hundreds of miles south of where some of the Inuit live. So from here to the northern regions is a good 2000 to 2500 km distance. People have no idea how cold and inhospitable the climate is there.
Some of the first nations peoples who live closer to me are able to forage for plants maybe from May to October or November. They pick berries and add them to their pemmican and do a lot of fishing and hunting. The Inuit, however, are bound by ice and snow most of the year and 6 months of that is in almost total darkness. You really think they will be foraging for lichens during that time even if lichen were around which I highly doubt that far north?
Each Inuit area is different but I'm sure that plants play a very, very small role in their diets and if their lives depended on them they would have died out long ago. There is no reason whatsoever to even go into what plants they may have or may not have eaten. They make no difference to the life-giving properties of the meat and fat they usually eat. Wish the plant lovers would just grow up and realize that everything we need, including vitamin C (organ meats) and be found in meat.
The fact that they are questioning the findings of Vilhjalmur Stefansson, who would have no reason to lie, shows me they are threatened in some way by this information.