This is what St. Thomas Aquinas has in mind when he talks about truthful, authentic communication. This gas station owner has no qualms about telling us about what goes in to each gallon of his 20¢-per-gallon gas, a prototypical “rational” claim. Can you imagine Apple showing us all the costs involved in in their iPad?
What are the key features of a rational claim?
Photo courtesy of Hooniverse.com