Imagine for a moment that we were dropped into this planet and knew nothing about what foods to eat or about what options were available. Each of the following arguments are less about empirical evidence and more about logic, reason, and common sense.
Each of the 20 arguments ends in a question. Answer the question out loud to yourself. When you are finished with all 20, go through them all again and answer each question posed for a second time. When you have completed the second round, answer one last question. Ask yourself what the most likely natural diet of humans is.
That answer should dictate what foods you choose to consume from this day forward.