Can a person who is considered wise still be trapped in ignorance? What does Chapter 50 say about this?

Yes, according to Chapter 50, a person who is outwardly 'wise' can still have their knowledge completely covered by ignorance. This occurs when the person's mind is deluded and fixed on worldly matters such as wealth, luxury, and constant thoughts of wife and sons. The text states that such a person, being unsatisfied in sense enjoyment and deluded by these attachments, does not know their own welfare. As long as such a person is without devotion, their supposed knowledge is described as being nothing more than ignorance, highlighting that true knowledge is incompatible with deep worldly attachment.