Final answer:
A Heretic recognizes Dante as a Florentine in the medieval period due to the distinct cultural markers associated with city-states like Florence in literature and art, such as Dante's clothing or dialect.
Step-by-step explanation:
The sinner recognizes Dante as a Florentine because during the medieval and Renaissance periods, distinctive styles and characteristics were strongly associated with different Italian city-states, like Florence and Siena. For instance, in the artwork that depicts Dante, such as Domenico di Michelino's 'Dante and the Divine Comedy', there are specific depictions of Florence, which could hint at attire, dialect, or other cultural markers that might indicate someone's origin. In literature and art of the time, there was a great focus on individual city-states and their citizens, which were very much at odds with each other, leading to the assumption that each had very recognizable traits to the inhabitants of the cities.