Funny grammar memes+Images | However, a double positive never forms a negative Pupil from the back of the room: Yeah, right #8

Teacher: "A double negative usually forms a positive. But sometimes a double negative is still a negative. However, a double positive never forms a negative." —Pupil from the back of the room: "Yeah, right."
Teacher: "A double negative usually forms a positive. But sometimes a double negative is still a negative. However, a double positive never forms a negative." Pupil from the back of the room: "Yeah, right."
https://100xhahaha.com/pic!c70f4e77_st.jpg