Fallacy Finder

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Fallacy Library Denying the Antecedent
Formal fallacy

Denying the Antecedent

Assumes that if a condition is absent, the outcome must also be absent, even though the outcome could still arise in other ways.

Definition

Assumes that if a condition is absent, the outcome must also be absent, even though the outcome could still arise in other ways.

Example
If the file is in the cloud, I can open it from home. The file is not in the cloud, so I cannot open it from home.
Extended explanation

How to think about it:

Assumes that if a condition is absent, the outcome must also be absent, even though the outcome could still arise in other ways. In practice, the key question is whether the conclusion is supported by evidence and logic, or whether it depends on this reasoning shortcut instead.

Related entries

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