The phrase "taking to be" refers to the act of assuming or believing something to be true. Some antonyms for this phrase include: doubting, questioning, refuting, disputing, rejecting, denying, neglecting, dismissing, and ignoring. These contradictory terms all suggest a lack of acceptance or belief in the initial assumption. Doubting indicates uncertainty or suspicion, while refuting and disputing suggest a firm rejection of the idea. Rejecting and denying imply an outright refusal to accept the truth of the matter. Neglecting, dismissing, and ignoring all suggest a deliberate avoidance or lack of concern for the matter at hand. Thus, these antonyms provide us with a range of words that express a deviation from the act of "taking to be.