The author assumes that Dala was a great painter, which is not a given, as with Matisse.
The author insinuates that both Dala and Matisse were the greatest painters of their time.
mnli hypothesis: The author insinuates that both Dala and Matisse were the greatest painters of their time. premise: The author assumes that Dala was a great painter, which is not a given, as with Matisse.