It said the brain's of humans can't multi-task on different subjects which results in cognitive levels lowering to that of an 8 year old according to the University of London, and why texting while driving laws were implemented. This study was republished by the University of Southern California https://appliedpsychologydegree.usc.edu/blog/to-multitask-or-not-to-multitask and the University of Sussex even went further publishing that intentional multi-tasking of pushing your brain to the limit leads to smaller Gray Matter density http://sro.sussex.ac.uk/id/eprint/50361/ Ths means the test are intentionally rigged to cause the failure results.
Meaning the Cogscreen is rigged because it would say the majority pilots would be cognitively slow if they had to take it.
So what are Pilots being tested for if their job entails total multi-tasking? Pilots would be crashing every time they flew an aircraft.