a.    “Marketplace of Ideas” Model:  The U.S. Supreme could has most favored the “marketplace of ideas” theory.  Its classical expression can be seen in Holmes’ dissent in Abrams:  “The best test of truth is the power of the thought to get itself accepted in  the competition of the market, and that truth is the only ground upon which men’s wishes can be safely carried out.”  That is, truth?will be accepted by marketplace (the ultimate test).