I could write a paragraph to explain some concept underlying a decision I made. OR there could be a word for this concept, in which case I can just use the word. But I can’t use that word if it’s not commonly understood.
The set of things that are common knowledge in a group of people is epistemic starting point. Imagine you had to explain your niche ideas about AI without using any concepts invented past 1900. You’d be speaking to toddlers.
I needed “common knowledge” to be common knowledge. It is part of our skill of upgrading skills. It’s at the core of group rationality.
I could write a paragraph to explain some concept underlying a decision I made. OR there could be a word for this concept, in which case I can just use the word. But I can’t use that word if it’s not commonly understood.
The set of things that are common knowledge in a group of people is epistemic starting point. Imagine you had to explain your niche ideas about AI without using any concepts invented past 1900. You’d be speaking to toddlers.
I needed “common knowledge” to be common knowledge. It is part of our skill of upgrading skills. It’s at the core of group rationality.