Which genre best describes Cicero's Pro Quinctio?

Cicero's "Pro Quinctio" is best classified as legal rhetoric because it is a defense speech delivered in a court of law. In this work, Cicero adeptly uses persuasive techniques to advocate on behalf of his client, Quinctius. Legal rhetoric is characterized by the aim of persuading an audience, often a jury or judge, in the context of legal proceedings, which is the primary function of this text. Cicero employs a range of rhetorical devices to clarify the situation, cast doubt on the accusations, and bolster his client's credibility, demonstrating the essential elements of effective legal argumentation.

The other genres mentioned do not align with the primary goal and context of "Pro Quinctio." Although philosophical discourse could be a feature of Cicero’s other works, it does not encapsulate the legal context of this speech. Political oratory also reflects Cicero's broader body of work where he engages in topics of statecraft and governance. Poetry is distinctly different in form and purpose, focusing instead on aesthetic expression rather than legal argumentation. Thus, the classification of "Pro Quinctio" as legal rhetoric accurately reflects its content and the framework within which Cicero operates.