Correlation vs. Causation Fallacy
The correlation vs. causation fallacy concludes a causal link between two events from evidence that is only correlational.
What does correlation miss?
Correlation measures how two things move together; Causation is one variable directly influencing another. Correlation alone leaves direction and confounders unexplained.
Outrageous example
The number of engineering degrees rises as the number of Lazeez restaurants opens. Therefore opening more Lazeez creates more engineers.
Ask: does X cause Y, or Y cause X, or a third factor cause both? If they cannot answer, the relation is only correlation.