correct answer traffic sign on blue sky

correct answer traffic sign blue sky accuracy precision right response accurate solution exact error-free spot- flawless verified faultless target errorless true perfect fault-free valid precise unerring unimpeachable unmistakable unquestionable unambiguous undisputed unassailable indisputable infallible incontestable irrefutable irreproachable impeccable unflawed spotless immaculate pristine unblemished unspotted undoubted unarguable unchallengeable uncontradicted unimpaired unscathed unmarred unhurt unharmed