> give them the wrong answer, they will be forced to correct you.
Before Stack Overflow, the savvy knew that this was a great way to get help with anything Unix-related. If you just went to Usenet or mailing lists and asked "how do I X?", you'd be pummeled by uppity greybeards going "RTFM, n00b". Ah, but if you created a sockpuppet and posted the wrong answer in reply to your question, then you'd be guaranteed to get useful advice.