The_Badger, on 2014-December-03, 10:08, said:
I think you would find that many would disagree with you. Double, in the modern game, is one of the most flexible calls around, with multiple meanings. I once worked out that in one partnership we had 11 flavours of double
I'll agree that leaving aside conventional gadgets, doubles historically were takeout or penalty, but nowadays a very large subset of the double is 'card-showing' or 'action' or 'DSIP', wherein the doubler has no particular takeout or penalty intention and is merely showing a certain set of values and asking partner to make that takeout or penalty decision.