It's good to complete things that you started.
Romeo is working on a final paper the night before it is due and needs to finish the concluding paragraph.
Romeo wants to be done with the paper.
Romeo presses forward, writes a conclusion, and sends the paper in before the deadline.
Romeo decides that he's done enough work, leaves out the concluding paragraph, and turns it in as-is.
The teacher reads the paper thoroughly and gives Romeo a good grade for the paper's completeness.
The teacher notices that it is unfinished and gives Romeo a low grade.