apparent ascertained assured attested certified clear clear as crystal crystal-clear decided determinate determined discernible distinct established evident explicit express fixed guaranteed in the bag indisputable indubitable made sure manifest nailed down noticeable observable obvious on ice palpable patent perceivable perceptible perspicuous plain plain as day proved secure seeable self-evident self-explaining self-explanatory set settled stated straightforward tangible tested to be seen tried unmistakable visible warranted