unambiguous — not ambiguous, or unclear; distinct; unequivocal: The object of the experiment was to reach an unambiguous conclusion about climate change.
certain — If you are certain about something, you firmly believe it is true and have no doubt about it. If you are not certain about something, you do not have definite knowledge about it.
clear — Something that is clear is easy to understand, see, or hear.
definite — If something such as a decision or an arrangement is definite, it is firm and clear, and unlikely to be changed.
sure — free from doubt as to the reliability, character, action, etc., of something: to be sure of one's data.
determined — If you are determined to do something, you have made a firm decision to do it and will not let anything stop you.
obvious — easily seen, recognized, or understood; open to view or knowledge; evident: an obvious advantage.
plain — clear or distinct to the eye or ear: a plain trail to the river; to stand in plain view.
unequivocal — not equivocal; unambiguous; clear; having only one possible meaning or interpretation: an unequivocal indication of assent; unequivocal proof.
unquestionable — not open to question; beyond doubt or dispute; indisputable; undeniable; certain: an unquestionable fact.
