Introduction: This argument is a (hopefully) well known part of the movie Willy Wonka and the Chocolate Factor, which was produced in 1971. In this film, the Oompa Loompas, mysterious workers at the chocolate factory sing a number of songs amounting to criticism of the children featured in the story. Each of the Oompa Loompa songs effectively points out the misconduct of an individual child and makes a case for changing that behavior.
This particular passage is the tune the Oompa Loompa’s sing at Violet Beauregarde, a girl who obviously likes her gum.
Key Facts: It’s worth considering that the Oompa Loompas play the role of a chorus in much the same manner that the convention was used in old Greek theater. In this case, they deliver a moral lesson which not only speaks to the characters in the story but also echoes lessons many parents might have given their own children.
Text: Here tis!
“Gum chewing’s fine when it’s once in a while
It stops you from smoking and brightens your smile
But it’s repulsive, revolting and wrong
Chewing and chewing all day long
The way that a cow does.”
Comments: I got nuthin!
Statements: In the following, statement 5 is rewritten so as to spell out the comparison. Statement 6 is the implied conclusion of the entire argument. It comes very close to matching statement 1, but it also entails the negative implications of chewing too much, which is of course the main thrust of the moral lesson.
 Gum chewing’s fine when it’s once in a while.
 It stops you from smoking.
 (It) brightens your smile.
 It’s repulsive, revolting and wrong chewing and chewing all day long.
 [Cows chew gum all day long.]
 [Gum should be chewed in moderation.]
Diagram: the diagram for this argument seems pretty straight-forward to me. Two reasons to say gum chewing is okay in moderation and one to show that it’s bad to chew gum too much. These two combine together to suggest a general proposition about doing the one and not the other.
Note that an alternative approach might be to spell out a more explicit negative statement about the need to avoid excessive gum chewing. This would perhaps capture the immediate significance of the lesson directed at Viola in the wake of her blueberry gum fiasco, but it has the down-side of complicating the signifcance of the counterpoint (that gum chewing is good when done in moderation), so I have opted here to treat the point as a more general lesson. Either approach seems plausible to me.
Discussion: This argument raises the following themes; Analogy, Appeal to Emotion, Causation, Missing Assertions, Moral Reasoning, Voicing.
Analogy: The Oompa Loompas compare shewing gum to the behavior of a cow chewing cud. Whether or not this is a good reason to avoid chewing gum is another question.
Appeal to Emotion: The main thrust of the analogy to cows chewing cud appears to be an appeal to emotion.
Causation: Both statements 2 and 3 suggest a causative relationship between chewing gum and some desirable effect. Whether or not these claims are justified is open to question, but they are sufficient to suggest that this argument involves a degree of causal reasoning, unsupported as the argument is in it’s current form. (Damned Oompa Loompa’s never cite any peer-reviewed papers!)
Missing Assertions: As is common in a great deal of reasoning, the actual conclusion of this argument is unstated in the original song. There are a couple different ways to think about what that final conclusion would be, but in its original form, the implications are left unstated.
Moral Reasoning: As the argument in question here is about how people (and in particularly children) should moderate their fum-chewing, it raises familiar questions about what it means to say that someone should or should not do something.
In this tune as well as the others, the Oompa Loompas seem to emphasize the negative effects of the behavior in question which suggests that this argument might be best construed in consequentialist terms. They are suggesting that excessive gum-chewing will make someone look foolish, or at least cowlish.
Voicing: I think it’s fair to suggest that the Oompa Loompas speak for the show in this and their other songs, in effect providing a moral lesson directed specifically at the children in the viewing audience. When Viola and the others produce arguments expressing their own vies on these topics, they appear to be voicing the imagined voices of children in need of correction. The events of the story then reveal the foolishness of their actions, and the Oompa Loompas arrive to drive the point home with a specific moral lesson. That moral lesson is a real lesson directed at children who may be trying to decide how to deal with issues such as how much gum should I chew.
Evaluation: I’m not going to do a complete evaluation here, but I will mention a couple of specific themes.
Statement 2: As part of a lesson directed at children this is an odd point to make at the very least, but presumably it could be interpreted as a claim relevant to the conduct of adults which would also be a concern to children. Either way, we could ask whether or not chewing gum actually stops people from smoking. That those trying to kick a smoking habit often chew gum in place of it would seem to suggest that there may be some connection here, at least in this specific context, but it is by no means clear that gum chewing in general serves to keep people from smoking,
Statement 3: I am not at all sure that this statement is true, either in general or in specific contexts such as right after a meal.
5->4: This inference is questionable at best. Presumably, the point of the analogy is to suggest that one would not wish to behave as a cow does, but it isn’t clear that there is any objective reason for this preference. Neither is it clear that moderate gum-chewing would be any less comparable to chewing cud than constant gum-chewing. Arguably this is a pretty naked attempt to trigger an emotional reaction.
Final Thoughts: The temptation to finish with an Oompa Loompa tune about good reasoning is very strong here, but I am going to show restraint, and I think the Oompa Loompas would be proud.