Fire, on the other hand, should imply smoke. So they estimated P(smoke) as being 1:10M hours, but we got fire with 2:10K, which suggests that P(smoke) is at lea

Fire, on the other hand, should imply smoke. So they estimated P(smoke) as being 1:10M hours, but we got fire with 2:10K, which suggests that P(smoke) is at least 1:5K or more often.