premise: A man wearing a blue and black plaid overshirt sells organic fruit to a man in a gray polo shirt. hypothesis: A farmer is selling his produce.
entailment: Fruit (including organic fruit) is a type of produce, and a man who grows things is a farmer.  Sales of produce (especially organic produce) in the manner described typically only occur at farmers' markets, with the farmer(s) selling directly to the end consumer.  Also, a "blue and black plaid overshirt" is an article of clothing stereotypically worn by farmers.