4 ms·

I'm pretty sure that's how Yahoo! Answers works as well, no?

• sibsibsib 16y ago
  and stack overflow...
  • damncabbage 16y ago
    Stack Overflow doesn't "require" it; it's encouraged, and people tend to look down on you if you don't. (Enforcement via culture instead of by rules.) Having said that, given the amount of abandoned questions on EE, I don't think their patent is quite working for them.