The term "patently true" refers to a statement or fact that is obviously and unquestionably accurate. Antonyms for this phrase could include "doubtful," "questionable," "ambiguous," or "suspect." In other words, if something is not patently true, it may be subject to interpretation, analysis, or debate. Similarly, synonyms for "patently true" might include "indisputable," "undeniable," "evident," or "self-evident." By using antonyms and synonyms to explore the nuances of language, we can gain a richer understanding of the world around us and communicate more effectively with others.