If there was or is ever anyone in the world who said 'no', I would be very upset, to say the least. A passion for the intellect is at the core of my being. I want to learn because it is like my need for air. I need air, food, shelter, and knowledge. As said elsewhere in this thread, knowledge is its own reward, knowledge is power, knowledge is surety, knowledge is agency, knowledge is the foundation of wisdom, knowledge is the foundation of advancement. When someone says 'I don't know', that should be an invitation. 'I don't know' should mean 'Teach me.' I'm graduating in two weeks with a bachelor's degree in biology and continuing on to a PhD program (as soon as I get in). Convert this desire into an action. Immerse yourself. Revel in wonder. Something might draw you. If you decide to be a physicist, that doesn't mean you have to stop learning about philosophy. You're just becoming a master of one of these subjects and getting the tools you need to discover new knowledge that nobody else knows. And when you discover new knowledge - as I've done a couple of times now, since I have a publication and have presented a poster - take a moment, every time, and revel in the fact that you are the first person to know it.I want to know everything. And I mean EVERYTHING. I want to know everything about every hard science, I want to know about every advance in medicine as soon as it's been proven beyond casual or unrelated correlation. I want to know the history of every civilization man has record of, the motivations of great leaders and demagogues. I want to know every philosophy, it's effects on it's followers and the real world. I want to know every magicians every trick. My therapist posits that this comes from an inherent personal curiosity.
When someone says 'I don't know', that should be an invitation. 'I don't know' should mean 'Teach me.'
When I say it, it means, "Teach me or I will drop what I'm doing and teach myself." However, in my experience when others say it, it's an excuse.