Which term describes an idea that is not proven true?

The term "theoretical" is appropriate for describing an idea that is not proven true because it pertains to concepts, principles, or hypotheses that are based on speculation or conjecture rather than empirical evidence. Theoretical frameworks often serve as a starting point for further investigation or experimentation, allowing for the exploration of ideas and the development of interpretations before reaching a conclusion supported by solid evidence. This distinguishes it from ideas that have undergone rigorous testing and validation.

In contrast, "ambiguous" refers to something that can be understood in multiple ways, lacking clarity or certainty, which does not specifically imply that the idea is unproven. "Comprehensive" describes something that is thorough and inclusive, indicating completeness rather than uncertainty about the truth of an idea. Lastly, "ubiquitous" signifies something that is present everywhere or pervasive, which is unrelated to the concept of being unproven. Therefore, "theoretical" captures the essence of an idea that remains unverified and open to discussion or investigation.