Final answer:
Definitions are not just for clarifying the unknown; they create precision in communication and provide a foundational understanding of concepts, such as 'truth' and 'innocent', in philosophical arguments.
Step-by-step explanation:
The statement "Definitions are used only to clarify the meaning of expressions that are not understood," is false. Definitions serve not only to clarify unfamiliar expressions, but also to provide precision and specificity in communication.
A definition illustrates an idea, word, or expression, allowing the definer to explain a unique meaning of a topic through details and analysis. This might involve providing necessary and sufficient conditions, using definite descriptions, and avoiding ambiguous language. In philosophy, using clear and rigorous definitions is crucial when discussing concepts such as "truth" or "innocent" to craft effective arguments.
Moreover, definitions can also be used to analyze and explain consistent usage within a particular domain or context, beyond just everyday comprehension challenges. By working towards a more fundamental understanding of a term, one can explore whether its common usage fits within a larger understanding of the world.
For example, when discussing truth, philosophers might offer definitions that attempt to move beyond circular explanations, aiming for a definition that is both noncircular and illuminating.