> We cannot digest any plant.

I am really dying to know what exactly you mean by that. Just yesterday I murdered a couple plates of spaghetti with a sauce with onions, garlic, baby tomatoes, tomato puree, and plenty of paprika, cayenne, black, green and white pepper, all sauteyd in extra virgin olive oil. The only thing that wasn't plants in that was the whey from my cheesemaking that I use in cooking to avoid waste. Works great to thicken sauces, soups, stews, etc.

Today was cheesemaking day so I didn't have time to cook and I only had a salad, but I'm bringing up yesterday's meal because I can say with certainty that it was digested. Like, around this morning when I got up I could not miss it.

So what the hell do you mean "we cannot digest any plants"? Who's we? Sharks? Cats? Spiders? Who?