Technically, it is possible to eat pure solid carbon, but it is not advisable or recommended. Pure solid carbon, also known as graphite or diamond, is not digestible by the human body and has no nutritional value.
Graphite, commonly found in pencils, is a form of carbon that is not toxic, but it would not provide any nourishment or sustenance if ingested. Diamond, another form of pure carbon, is extremely hard and would likely damage your teeth if you attempted to bite into it.
In general, it is important to have a balanced and varied diet that includes essential nutrients, such as carbohydrates, proteins, fats, vitamins, and minerals. These nutrients are necessary for the proper functioning and health of our bodies. Consuming pure solid carbon would not contribute to meeting these nutritional needs and could potentially be harmful. It is always best to stick to a diet consisting of food items that are safe and beneficial for your health.