S₁: The wise men laughed at Galileo for presuming to differ from the great Aristotle. S₆: But Galileo said he could prove his statement. P: He then climbed to the top, carrying with him a ten-pound shot and a one-pound shot. Q: So one morning he took some students and teachers to the base of the famous Leaning Tower. R: Balancing them on the edge of the tower, he let them fall together. S: Both struck the ground together, as he had asserted that they would. The proper sequence should be