Posted 2015-January-12, 13:32
The GIB CC does not address the issue of whether new suit advances are forcing after our overcall. We know from experience that they are not at the 1 and 2 levels, and apparently, now also at the 3 level. I would have to guess that the description would indicate as such.
IMO 3C is a bad bid anyway. With GIB I pass 2H quickly. With a human partner I would raise to 3H.