I've wondered about this 4 years but never asked about it. lets say 4 example that there are 3 ppl in the hand. lets say i raise 1000 chips, the 2nd guy calls, & the 3rd person goes all in w/ his last 1200 chips, basically re-raising me 200 more chips. but then i'm only given the option 2 call, not raise. if he raised, y can't i re-raise? is it cuz his raise wasn't at least the size of my raise? or not at least the size of the bb?