The conversation between human and AI assistant.
[|Human|] Given this paragraph about the Roman temple known as the Pantheon, tell me whether we definitively know why the temple was called the Pantheon.
[|AI|] We do not know why the temple was called the Pantheon. Even Cassius Dio, a Roman senator who would have had more context by nature of living and ruling in Roman society, was only able to speculate where the name came from.
[|Human|] 
Given this paragraph about the Roman temple known as the Pantheon, tell me whether we definitively know why the temple was called the Pantheon.