The preschool teacher says, ""We're going to do vocabulary today. Who can use the word 'definitely' in a sentence?"" Mary raises her hand and exclaims, ""Me me me!"" The teacher says, ""Go ahead, what's the sentence? Mary replies, ""The sky is definitely blue."" ""That's good, Mary,"" says the teacher, ""but the sky can also be gray or white."" Sam raises his hand and states, ""Grass is definitely green."" The teacher says, ""That's good, Sam, but grass can be brown, too."" Jim raises his hand a…