Even Google doesn't know that the answer is found on "page 47 of a thread". The usual operating procedure is to search for threads covering the topic in question and READ through them. But some people are too lazy/impatient to read through a longish thread and instead do one of (or even both of!):

• post at the end of the thread: "I'm too lazy to read through the thread please post answer again"
• start a new thread