[Magicmanu]

The floor is incorrect (though, of course, house rules obtain).

I don't know about arrogant and condescending, but RR is right. The half-bet rule applies to limit poker, not big bet poker.

I think the following is from and old version of Mike Caro's rules:

Suppose we have players A, B, and C in a game where the blinds are $5-10. Player A opens with a raise to $50 total chips (he matches the $10 blinds and raises by $40). Player B reraises all in for a total of $70 total chips (he calls the bet of $50 plus raises $20 more). Player C cold calls the $70. Player A can not reraise since Player B did not put in a legal raise. Player B raised by only $20 when he needed to match a raise of $40. Note that Player C could have raised if he desired, since he had not yet acted in response to the original bet.

Now let us consider an example of when player A could reraise. Again we have players A, B, and C with the blinds at $5-10. Player A raises to a total of $40 chips (he matches the blind of $10 and raises by $30). Player B pushes all in with $70 (calls the $40 and raises by $30). Player C then cold calls. Player A can reraise as much as he wants because Player B has made a legal raise. Player B has matched the original raise amount of $30.