Fallacy
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Part of:Spot fallacies in the news →
A slippery slope says a modest step will lead, without a shown mechanism, to an extreme result. Slopes can be real when each step is likely. The fallacy is the bare claim that one concession dissolves the whole line.
Slippery slope is filed here as a fallacy. If you cannot point to that move in the remark in front of you, you do not yet have this fallacy. Disliking the conclusion is not enough, and a true premise does not repair a broken step.
This page adds no new definition and no statistic. The three scenes below only move the library’s example into a meeting, a news sentence, and a social feed. None of them is a reported case, and none of them carries a number.
The library’s example is the anchor, quoted so the later scenes cannot drift: ““If students may retake one quiz, they will retake every exam, and then degrees will mean nothing.” No reason is given for why one retake policy forces the rest.” The three that follow change the room and keep the step.
Picture that example in a meeting, aimed at someone who has to answer before the next item. If the room cannot give the reply on the card, it has not answered the point. It has used Slippery slope. No survey of offices is claimed. The test is whether the step matches the card.
The same step can sit in a speech or a headline, where the pause is shorter and the audience is larger. Imagine the stored example said into a microphone and left unpacked. This is not a claim about a particular broadcast or a particular paper. The correction is still the reply on the card, not a different theory of the press.
Imagine the example as a caption. Agreement is not evidence the step was valid, and outrage is not evidence a different fallacy was in play. Match the step to the definition before you name it.
Ask for the mechanism at each step. What rule, incentive, or precedent makes the next step likely? If there is none, the frightening ending is not evidence against the first step.
“That is Slippery slope” is not yet an answer. Name the step, then ask the question the card tells you to ask. If the remark survives, drop the label. If it fails, you still owe a reason for what you think instead. The reply does not hand you a new conclusion.
Slippery slope is easy to shout in place of a neighbour. The nearest card people mix this up with is False dilemma. Use the comparison linked under this section when you are unsure which name fits. The comparison quotes the cards. It does not invent a third definition.
Write down the sentence you think is the mistake. If it matches one definition, use that name. If it matches neither, do not force a label. If it matches both, answer the two steps separately.
“If the surgery lets one patient book online, soon nobody will see a doctor in person and medicine will collapse.” What is the weak step?
The options and the explanation open in the quiz. Scoring stays on this device. There is no pass mark on this card.
A slippery slope says a modest step will lead, without a shown mechanism, to an extreme result. Slopes can be real when each step is likely. The fallacy is the bare claim that one concession dissolves the whole line.
“If students may retake one quiz, they will retake every exam, and then degrees will mean nothing.” No reason is given for why one retake policy forces the rest.
Ask for the mechanism at each step. What rule, incentive, or precedent makes the next step likely? If there is none, the frightening ending is not evidence against the first step.