Invincible ignorance, or  argument by pigheadedness,  

refers to fallacious reasoning where an  individual insists on their viewpoint  

despite being confronted with actual,  incontrovertible evidence to the contrary.

This stubbornness is not due to the lack of  understanding but rather a willful refusal to  

accept any evidence that might contradict  their preconceived beliefs or claims.

Everyday Example:

A sports fan is adamant that a famous  athlete never lost a game in their  

entire career. When presented with official game  

records and historical footage showing  that the athlete did indeed experience  

several defeats, the fan dismisses all this  documentation as errors or fabrications.

They maintain their belief solely based on  

personal admiration, irrespective of  the irrefutable historical evidence.