Poisoning the well

In old times, it was an often-used method to poison the wells of your enemy. Actually, it’s not only a method of the ancient past. In March 1917, during the First World War (1914-1918), the German army decided to shorten their lines on the Western Front in Northern France in order to make them stronger and they left extended areas to the French and the British armies. The Germans devastated these areas with scorched earth tactics and they poisoned the wells there as well. I am convinced that this method is still applied in the present wars in the world, although I have no evidence. This is already bad enough, but when in medieval Europe an epidemic broke out, often the false myth went around that Jews secretly poisoned wells and drinking fountains used by Christians and that this was the cause of the epidemic. Often this created a gulf of antisemitism if not violence and injustice against Jews. Certainly in those days it was difficult for the Jews to refute such false allegations.
Poisoning the well – in reality or confabulated – is not only a method of fighting, it has also become the name of a fallacy, so a mistake in our way of thinking. It belongs to the category of ad hominem fallacies or “playing the man”. The essence of the poisoning the well fallacy (PTW) is this: “PTW occurs when we illegitimately prime our audience with a pre-emptive strike against, or with adverse information about, an argumentative opponent before the latter has had a chance to say anything in her own defense or in defense of her point of view.” This will make the audience – and maybe the speaker as well – prejudiced against the opponent with the effect that the audience will interpret the opponent’s claims “as ‘fulfilling’ and ‘confirming’ the presumptions buried inside this conceptual trap.” (Ruiz, p. 196) In other words, the opponent is already put in a bad light before she has had any possibility to react, with the possible effect that she isn’t taken seriously or that her reaction is seen as a confirmation of what the speaker said about her, anyhow. For example (from “Poisoning the Well”):

“Tim: Boss, you heard my side of the story why I think Bill should be fired and not me. Now, I am sure Bill is going to come to you with some pathetic attempt to weasel out of this lie that he has created.
Explanation: Tim is poisoning the well by priming his boss by attacking Bill’s character, and setting up any defense Bill might present as ‘pathetic’. Tim is using this fallacious tactic here, but if the boss were to accept Tim’s advice about Bill, she would be committing the fallacy.”

As Nelson Todd explains: “The reason [PTW] is a fallacy is that it, like other fallacies, operates on the basis of little or no evidence. As such, it is prone to yield erroneous conclusions because it is not an orderly, objective way to reason through an argument.” The argumentation of the speaker is only based on the defamation of the opponent and then already before she got a chance to speak. It is not based on what the opponent really says. Moreover, besides that the other person is defamed, it is quite possible, even if the defamation generally is true, that it is not true in this case. If you say or think that John is a pathological liar, it is still possible that in this case he speaks the truth.
Poisoning the well can be an intentional tactic to “win” your case. It is often used as a tactic by politicians in order to get the voters on their hand. However, it is also possible that the speaker really believes what she says. Then PTW is not only a kind of false reasoning but also a kind of prejudice in the head of the speaker. If so, PTW is not only a kind of false reasoning that influences what others do but also your own actions. To take an example of Nelson: If “a patient in alcohol or drug rehab … encounters a therapist who has never had any alcohol or drugs themselves[, the] patient might think, ‘There is no way this person will ever truly understand what it is like to be an addict – therefore, I am not going to listen to anything they have to say.’ ” But maybe the therapist has much experience with treating addicts and has become the best expert in this field. The patient is prejudiced against the therapist. Since every person has prejudices, everybody of us should be aware that he or she can fall into the PTW trap. For instance: “I think that he is such and such a person, so therefore he’ll react in X way”. But is he really such and such a person? Isn’t it a bias in your head? Beware, for often we don’t poison the wells of our adversaries but our own wells.

Sources
- Nelson, Todd, “How ‘Poisoning the Well’ Hurts Everyone”, op website https://www.psychologytoday.com/intl/blog/us-and-them/202310/how-poisoning-the-well-hurts-everyone
- “Poisoning the Well”, op website https://www.logicallyfallacious.com/logicalfallacies/Poisoning-the-Well
- Roberto Ruiz, “Poisoning the well”, in Robert Arp; Steven Barbone; Michael Bruce (eds.), Bad arguments. 100 of the most important fallacies in Western philosophy. Oxford, etc.: Wiley Blackwell, 2019; pp. 196-200.