Social security disability pension requires proof of real skills affecting career, not just job duration.

The Supreme Court partially allowed the cassation appeal, quashing the appellate court's decision regarding Stanisław K.'s disability pension. The court found that merely performing a job for a period does not qualify as acquiring real skills unless those skills impact the worker's career, such as enabling higher wages or promotions. Consequently, the court ruled that the appellant's ability to perform other simple physical work precludes a finding of total disability based solely on health issues preventing his previous trade.