For P1, Goodman uses “All emeralds are green” and when we use PUN, the conclusion is “All emeralds are green.” When we apply that to P2 by using grue, – “All emeralds are grue” and apply PUN, the conclusion would be “All emeralds are grue.” How can these two different words have the same meaning – that they’re both emeralds? Although one of these arguments is good and the other is bad, PUN supports both of them, showing how unreliable it is as they contradict each other. Though, the main question here is “How do we know which one is good and which one is bad?” Goodman thinks it is necessary to find principle reasons that prescribe good/bad. One explanation would be since we are already familiar with the word green, it makes the word commonly used and known. However, the word grue is foreign to us as it is just a made-up
For P1, Goodman uses “All emeralds are green” and when we use PUN, the conclusion is “All emeralds are green.” When we apply that to P2 by using grue, – “All emeralds are grue” and apply PUN, the conclusion would be “All emeralds are grue.” How can these two different words have the same meaning – that they’re both emeralds? Although one of these arguments is good and the other is bad, PUN supports both of them, showing how unreliable it is as they contradict each other. Though, the main question here is “How do we know which one is good and which one is bad?” Goodman thinks it is necessary to find principle reasons that prescribe good/bad. One explanation would be since we are already familiar with the word green, it makes the word commonly used and known. However, the word grue is foreign to us as it is just a made-up