On 03/04/2014 13:01, John C Klensin wrote: > > --On Wednesday, April 02, 2014 19:42 -0400 Ted Lemon > <ted.lemon@xxxxxxxxxxx> wrote: > >> On Apr 2, 2014, at 6:54 PM, Clint Chaplin >> <clint.chaplin@xxxxxxxxx> wrote: >>> Will there be an option for not-tea? >> No. You can't have tea and not-tea. > > At least until you answer the question "when is tea not tea" in > a satisfactory way. For example, the stuff that comes > identified as tea but arrives in bags in many bad restaurants > (and others that should know better), is pretty clearly not tea > but it is less clear whether it is not-tea or not. RFC 7169 describes a situation where TRUE and FALSE might mean the same thing. I can't see, therefore, why tea and not-tea cannot be simultaneously true (or false). In the supermarket the other day, I was handed a free sample of Red Bush Tea, which is clearly not tea. I do not know whether it is not-tea. Brian