The word "more conjecturable" refers to something that is able to be guessed or hypothesized. Its antonyms include words such as certain, definite, conclusive, and proven, which all suggest that something is known with a high degree of confidence. These antonyms are often used in scientific contexts, where hypotheses are tested and proven through rigorous experimentation and analysis. By contrast, the term "conjecturable" implies that something is not yet certain, and that further investigation or evidence may be needed to fully understand it. In general, these antonyms serve to emphasize the importance of critical thinking and empirical evidence in the search for knowledge and understanding.