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Sunk Cost Fallacy
Understand sunk cost fallacy, past-investment reasoning, and how LogicLens can help readers notice backward-looking justifications.
What it means
The sunk cost fallacy treats past investment as a reason to continue, even when future costs and benefits point another way.
Why it matters
Past effort matters emotionally, but decisions should usually turn on what happens next.
LogicLens helps readers detect and review signals associated with sunk cost fallacy and many related article-level patterns, including weak reasoning, loaded wording, missing context, framing, sourcing gaps, and manipulative persuasion.
Common signs
- The main reason to continue is what has already been spent.
- Future costs and benefits receive less attention.
- Stopping is framed as wasting the past.
Example
A report argues a failing project should continue mainly because taxpayers have already spent millions on it.
Reader check
Ask what decision would make sense if no money or time had already been spent.
FAQ
What is Sunk Cost Fallacy?
The sunk cost fallacy treats past investment as a reason to continue, even when future costs and benefits point another way.
Can LogicLens help detect sunk cost fallacy?
LogicLens is built to help readers detect and review signals associated with this pattern and related forms of weak reasoning, loaded wording, missing context, framing, and manipulative persuasion in online content.
How do I spot sunk cost fallacy while reading?
Ask what decision would make sense if no money or time had already been spent.