Perfect solution fallacy:

Definition Example
When it is assumed that a perfect solution must exist and/or that a solution should be rejected because some part of the problem would still exist after it has been implemented. But, Dad! Driving the family station wagon to work and school is not going to be nearly as cool as driving around in the Mustang I crashed!
Also known as: nirvana fallacy

The perfect is the enemy of the good.” ~Voltaire

Case Study One

Some in the US claim that tighter border controls are “not the solution” to the problem of illegal immigration since it would never completely stop the flow of illegal immigrants, and ignore the fact that tighter borders might make a significant difference.

Case Study Two

Some argue “You can’t really stop illicit drug use, so there is no sense in having laws against illicit drugs.” Changing the referent from illicit drugs to murder highlights the fallacy.

Keep in mind that a fallacious argument does not entail an erroneous position.

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