Claim: Kornelia Kubińska participated in the World Championships in 2009 at the age of 23.
Evidence: At the FIS Nordic World Ski Championships 2009 in Liberec, Kubińska finished sixth in the 4 × 5 km relay, 21st in the 30 km, 29th in the 10 km, 40th in the 7.5 km + 7.5 km double pursuit, and 66th in the individual sprint events. The FIS Nordic World Ski Championships 2009 (Czech: Mistrovství světa v klasickém lyžování Liberec 2009) took place 18 February – 1 March 2009 in Liberec, Czech Republic.