If James Bond asked a bartender for a vodka martini, "shaken not stirred" and the bartender, out of sight of Bond, stirred it instead of shaking it, what would happen? Would James Bond take one sip and angrily tell the bartender, "I said, shaken, not stirred!" Or would he be unable to tell the difference?
If you think James Bond could tell the difference, what quality do you think he had that allowed him to discern whether a drink has been shaken or stirred?
If you think James Bond could not tell the difference then why do you suppose he ordered it that way?