How does caliban show that he is more intelligent than stephano and trinculo?

In scene 2, Caliban is still viewed as a "worker beast," in spite of being uncovered as a human. Stephano and Trinculo, however ostensibly less savvy than Caliban, still treat him like he is not really human in view of his local status and skin shading; and the way that Caliban endures this treatment and verbally abusing demonstrates that he acknowledges this mediocrity and Stephano's shaky expert also. Caliban demonstrates that he is more insightful than Stephano and Trinculo is that he understands that opportunity from Prospero is more critical than apparel or wine.