By that logic, there’s no such thing as a diet. You technically can’t go on an all-meat diet because animals eat plants or animals that eat plants, or animals that eat animals that eat plants (you get the gist)
You know that dead organisms all die at some point, and once those dead organisms die, they will begin to decompose, once they start to decompose, nature's detritivores will take those corpses and turn it into dirt for future life to grow, and once plants grow on that dirt that had died and been turned into the dirt by the detritivores, the plants will consume those nutrients from the corpses that were turned into dirt, and when you eat plants, you are technically consuming the nutrients from the original dead organisms. There is no such thing as vegan , let me explain...
