positive

Synonyms: absolute actual affirmative assured categorical clear clearcut cocksure cold complete conclusive concrete confident consummate convinced decided decisive direct downright explicit express factual firm forceful forcible genuine hard inarguable incontestable incontrovertible indisputable indubitable irrefutable out-and-out outright perfect rank real specific sure thorough thoroughgoing unambiguous undeniable unequivocal unmistakable unmitigated

Antonyms: doubtful indefinite negative uncertain unsure

Synonyms: affirmative constructive effective efficacious forwardlooking good practical productive progressive reasonable sound useful

Antonyms: disadvantageous negative unhelpful