It’s just an informal way to say that we’re probably typical observers. It’s named after Copernicus because he found that the Earth isn’t as special as people thought.
I don’t know the history of the term or its relationship to Copernicus, but I can say how my forgotten source defined it. Suppose you want to ask, “How long will my car run?” Suppose it’s a weird car that has a different engine and manufacturer than other cars, so those cars aren’t much help. One place you could start is with how long it’s currently be running for. This is based on the prior that you’re observing it on average halfway through its life. If it’s been running for 6 months so far, you would guess 1 year. There surely exists a more rigorous definition than this, but that’s the gist.
What is a Copernican prior? I can’t find any google results
It’s just an informal way to say that we’re probably typical observers. It’s named after Copernicus because he found that the Earth isn’t as special as people thought.
I don’t know the history of the term or its relationship to Copernicus, but I can say how my forgotten source defined it. Suppose you want to ask, “How long will my car run?” Suppose it’s a weird car that has a different engine and manufacturer than other cars, so those cars aren’t much help. One place you could start is with how long it’s currently be running for. This is based on the prior that you’re observing it on average halfway through its life. If it’s been running for 6 months so far, you would guess 1 year. There surely exists a more rigorous definition than this, but that’s the gist.
Wikipedia gives the physicist’s version, but EAs (and maybe philosophers?) use it more broadly.
https://en.wikipedia.org/wiki/Copernican_principle
The short summary I use to describe it is that “we” are not that special, for various definitions of the word we.
Some examples on FB.