Why is hypoxia especially dangerous for pilots flying solo? - ATPL

Question id 256 - Human Performance and Limitations - ATPL - Airline Transport Pilot license

In a multi-crew cockpit hypoxia will always be detectable.

Only a solo pilot is more prone to illusions.

Hypoxia improves night vision therefore the pilot will have no indication of danger.

Since the first signs of hypoxia are generally hard to detect.