For example, a self-taught person who is interested in specific subjects such as quantum, AI, biomimicry, etc., can ask questions to scientists who are experts in their field.
 Even lighter subjects such as fishing, how to live such and such fish in such and such an environment, its reproduction, its feeding etc., a simple farmer who wants to go back to old vegetables and know how he was plants before, what is the best place, the best soil, the best time etc.,