i was just pointing out that you wouldn't starve to death. The vegans, well, of course they're a whole other story to themselves.Gorillas are vegetarians and spend much of their day eating, their paunch is due to their having a digestive tract adapted to a vegetarian, raw diet.
If you tried it you would probably starve to death!
But, HE likely would not have had such philosophical or ethical points of view when it came to food. So, we know HE had fire. We know he liked to eat. i'm not at all shocked that they were able to cook. However, i think what we're asking is, what was going around when HE discovered that fire and or hot water made some foods easier to eat/digest and allowed new foods (starchy roots, etc) to be added to their diet.
This brings me to your question regarding the length of the human digestive tract. Over the last two million years, it either stayed roughly the same as it is now, or it has become shorter because of the efficiencies gained from cooking?
i don't know. But what i think, is that before cooking was discovered, People concentrated their diets, as much as possible, on energy rich foods. These would include nuts, berries, eggs, shellfish, and i'm sure a host of other foods that aren't coming to mind. Cooking didn't make people healthier, but it did raise the efficiency of digestion. i just don't it was so drastic as going from spending nearly every waking hour eating, to just a few hours a day.