Marks of a generalist

I like people watching. Some signs that have proven reliable of a person's incredible knowledge or skill.

They can:

• Pick up any book in the library and not be intimidated to read it
• Grab any ingredient from the store and understand what to make of it
• See any movement one can do with their body and have a good attempt at replicating it
• Look at any item, appliance, infrastructure in your house and understand how they work, and how to fix them if something goes wrong
• Look at any plant, bird, tree, bug or animal in your surrounding and understand their behavior, and role in the ecosystem 
• Walk for an hour around your town/surroundings and be able to narrate your environment interestingly enough to keep a tourist engaged
• For any action, have the skillset to do it without electricity or modern inventions
• Every word said or written, weighted and carefully considered