adj.: incontestable, indisputable, unimpeachable, above [beyond] suspicion, positive, with no possibility of doubt, clear and definite, that cannot be doubted or questioned, trustworthy
Thesaurus Group
apodeictic concessive, stated, stated, specified or stated, specifically hard, valid, authentic, practical, concrete, realistic, hardheaded, forthcoming, existent, existent, applicatory, faithful, hard, can Uphold Weight of, to be unbearable compressive force, hard, beefy, masculine, genuine, corresponding to known facts, secure, unimpeached, unyielding, hardly amused, plain, everyday, commonplace, adultness sophisticated, experienced in the affairs of life