Final answer:
The statement that 'uh-huh' and 'uh-uh' are always hyphenated is true. Hyphens in these interjections aid in clarifying pronunciation and meaning, and are typical for such nonstandard informal expressions.
Step-by-step explanation:
The interjections 'uh-huh' and 'uh-uh', which stand for 'yes' and 'no' respectively, are indeed hyphenated regardless of their position in a sentence. This is true because these words are considered informal nonstandard words, and the hyphens help clarify their pronunciation and meaning.
The statement suggesting that 'uh-huh' and 'uh-uh' are hyphenated wherever they occur in a sentence is true. However, hyphens are more broadly used to join two or more words serving as a single modifier before a noun, not necessarily in informal interjections only.