Three students are asked to discuss the sources of error that might have affected the outcome of the lab. Select the student that employs correct scientific reasoning. Student 1: If the spot was placed below the solvent level, this would cause the sample to be dissolved into the solvent pool before traveling up the plate. Student 2: If the solvent used has the opposite polarity of the stationary phase this will cause unequal movement of the sample. Student 3: If the developing chamber was closed too quickly than the sample wouldn't be able to travel on the TLC plate.

John Stuart Mill is arguing against conformity. The human being, through its faculties of "perception, judgment, discriminative feeling, mental activity, and even moral preference", only excercices those faculties when going against custom, against what is known as received wisdom. If someone merely follows the dictates of custom, then he is not thinking, or judging, or making moral choices: he is, so to speak, on autopilot, or simply following the herd. He is not asserting himself as an individual in full command of his humanity. In our daily lives we face many situations where we follow preestablished behaviors: at work, in the street, when dealing with our family. But it is only when we depart from what is expected from us that we become individuals, when we reject the well-worn path of custom and make personal choices.