You seem unable to comprehend that NONE of the definitions you posted (one of which I had already given) perclude the sales tax as being defined either as exclusive or inclusive.
That's the touble with you SQL Squad members. You thing it must be only a single way ... your way. Not one of those 5 definitions says it must be either exclusive or inclusive.
And don't go all "Looey-like" claiming that certain prepositions mean only certain things. That's truly nonsense and won't take you very far. The inclusive rate is the way the tax is defined in the bill and the way the receipt required is defined. Trying to warp that into some sort of "doublespeak" or "doublethink" is indeed doublespeak/think on your part.
Those definitions can mean either thing and you seem to not realize that. Show me where one of the 5 defines the tax as being exclusive (or inclusive) of tax. In fact, it can be either but you merely prefer to consider it only a single way for your own reasons. The FairTax website used it both ways and so trying to make that claim is erroneous also.
(a) i believe i said "commonly accepted definition" -- go poll a thousand people (heck, just do 10 people) and see what they understand "sales tax" to be. it is in my 6th grader's math book: a shirt cost $15. the sales tax is $4.50. what is the sales tax rate? (i'm not making this up)
(b) all of the definitions gave, as part of the definition, what i stated as being commonly accepted -- not one of them gave 'inclusive' as part of the definition. it is not the commonly accepted definiton. there is no nonsense about.