Note that this question was first put forward in 1955, so that it was a purely hypothetical question until 1 January 2000, when sapphires were discovered to be grue. (Before and after images of the same gem.)
The case makes an interesting parallel to the term “black swan”, another famous philosophical thought experiment that received unexpected data.
What changed? Are you telling a joke and those are pictures of different gems? Or is one in a different kind of light, or at a different angle? I don’t get it.
Edit: Or are you talking about what Alicorn was talking about farther down?
Note that this question was first put forward in 1955, so that it was a purely hypothetical question until 1 January 2000, when sapphires were discovered to be grue. (Before and after images of the same gem.)
The case makes an interesting parallel to the term “black swan”, another famous philosophical thought experiment that received unexpected data.
What changed? Are you telling a joke and those are pictures of different gems? Or is one in a different kind of light, or at a different angle? I don’t get it.
Edit: Or are you talking about what Alicorn was talking about farther down?
I’m telling a joke.