Many professors, mostly on the liberal side of the political spectrum, use their classrooms to proselytize students. I have taught economics for the past 40 years and challenge anyone to find even one student, among the thousands who went through my classes, who can say, "Professor Williams used his class to proselytize students." While acceptable at most universities, it is nothing less than academic dishonesty to do so. Like others I have my own values and opinions, such as those expressed in some of my nationally syndicated columns, but they never become a part of classroom discussion.
Learning how to think straight, as opposed to what values and opinions to hold, is the crucial part of education. Part of that learning is to be able to understand the distinction between subjective statements, for which there are no commonly accepted standards of proof, and positive statements for which there are. For example, the statement "Scientists cannot spit the atom" is a positive statement because if there's any disagreement, there are facts to which we can appeal to settle the disagreement. Just visit Stanford's linear accelerator and watch them do it. By contrast, the statement "Scientists should not spit the atom" is a subjective statement. There are no facts to which we can appeal to settle any disagreement. Disagreement can go on forever. A fairly good proxy for whether a statement is subjective is the presence of words such as should and ought. This lesson is closed by telling students that it is not being suggested that they purge their vocabulary of subjective terms such as should and ought because they are excellent tools to trick others into doing what you want them to do. However, in the process of tricking others, one need not trick himself.
A related lesson is dealing with terms such as better and best and worse. This lesson might be approached by my asking students which is the best system for resource allocation: capitalist, socialist or communist? After several fall for my bait, I tell them that the correct response is to tell me it's a nonsense question. It is akin to asking their physics professor: Which is the best state: a liquid, gaseous, solid or plasma state? However, if the physics professor were asked: Which is the cheapest state to nail a nail into a board? He could answer the question and probably say that it is the solid state. Going back to the question about capitalism versus socialism and communism, asking which system maximizes personal liberty and societal wealth, the answer would be capitalism, at least here on Earth.
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