Sonnets are a specific type of poem that follow a strict structure:
* 14 lines
* Iambic pentameter (10 syllables per line, alternating unstressed and stressed syllables)
* Specific rhyme scheme: The most common is ABAB CDCD EFEF GG
* Often a turn or shift in thought in the last two lines
While "True" does not strictly follow the traditional rhyme scheme, it does adhere to the other sonnet elements, making it a sonnet.