Final answer:
Thorne likely uses 'innocent' to describe some slang as being without harmful intent and not created to be rebellious or accusatory, indicating a neutral or positive evolution of language.
Step-by-step explanation:
Based on the passage provided, when Thorne describes some slang as 'innocent,' it likely indicates his belief that not all slang is created with negative or harmful intentions. The word 'innocent' implies that while some slang might be created with the intention to be rebellious or accusatory, there is also slang that is simply a natural evolution of language, without any underlying agenda. Slang can be a way to establish group identity or simply be a playful and creative take on language.