Very interesting thread hijack

Maybe some enterprising admin could split it off into a specific thread?
jillybean, on 2025-August-16, 07:36, said:
ANDREW ROBSON: Dbl. Why bid part of your hand, when you can bid all of it?
Yes, but you will never convince Zia that double shows all of this hand. And while he can be conservative about some things (I remember Duboin confiding that Zia was the only partner with whom he did not play transfer responses to 1
♣), I doubt that his is the conservative position here (negative doubles have been around for 70 years, after all).
The radical division is maybe between those who still retain that takeout and negative doubles are about undeclared suits and those who retain that they are about undeclared majors, or in their absence, cards - minors can always be bid if necessary.
To a lesser extent, maybe MP oriented vs IMP oriented - the former being ready to scuttle towards 3NT rather than a more natural minor contract. And finally the Acol brigade, who see no problem in bidding clubs rather than diamonds.
FWIW the basic system I refer to - written twelve years ago, so aging a bit, but still - says that "if our major is overcalled with the other major, Double loses its original scope of showing undeclared majors and shows generic useful values in a hand without a better natural declaration".